JPH0949860A - Antenna measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separate and remove the effect of the reflected waves caused by the peripheral environment of an antenna measuring field from an emitted pattern actually measured value. SOLUTION: The distance between an antenna 4 to be tested and a transmission antenna 1 or a receiving antenna is fluctuated by a measuring distance fluctuating means 8 while the antenna 4 is rotated by a rotary means 3 and a plurality of emitted pattern data of the antenna 4 to be tested at different measuring distances obtained by a pattern display means 7 are processed by a pattern processing means 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna measuring device, and can be applied to, for example, a device used for communication or a radiation pattern measurement of a radar antenna and a device used for evaluating a reflection source such as an antenna measurement field.

[0002]

2. Description of the Related Art Conventionally, as an antenna measuring device, FIG.
As shown in FIG. 5, for example, there are those described in “Antenna Engineering Handbook”, Chapter 8, page 428 (edited by Institute of Electronics and Communication Engineers, published by Ohmsha Co., Ltd.). In the figure, 1 is a transmitting antenna, and 2 is a transmitter connected to this transmitting antenna 1. Further, 3 is a turntable, and 4 is a test antenna installed on the turntable 3. The transmitting antenna 1 and the test antenna 4 are arranged so as to face each other at a measurement distance r0. Reference numeral 5 is a receiver connected to the antenna under test 4, 6 is a rotary base controller connected to the rotary base 3 for controlling the rotation of the rotary base 3 and for extracting rotation angle information from the rotary base 3, 7 Is connected to the receiver 5 and the rotary base controller 6, and generates and outputs the radiation pattern of the test antenna 4 based on the rotation angle information from the rotary base controller 6 and the received signal from the receiver 5. It is a pattern display.

Next, the operation will be described. Radio waves transmitted from the transmitter 2 are radiated into space from the transmitting antenna 1. The radio wave radiated into this space is received by the test antenna 4 and the reception signal is extracted by the receiver 5. In this state, when the turntable 3 is rotated about the y-axis by the turntable control signal from the turntable controller 6, the test antenna 4 mounted on the turntable 3 is also centered on the y-axis. To rotate as. The pattern display 7 generates and outputs the radiation pattern of the sample antenna 4 as shown in FIG. 16 based on the rotation angle information from the rotary base controller 6 and the received signal at each angle of the receiver 5.

Further, as shown in FIG. 17 in which parts corresponding to those in FIG. 15 are designated by the same reference numerals, for example, ORBIT
Published in 1995 Test & Measurement Catalog I.21 ~ I.2
There is an antenna measuring device that uses the variable measuring distance mechanism described in "5." In the figure, 8 is a measuring distance variable mechanism attached below the rotary table 3, and 9 is a measuring distance controller for controlling the measuring distance varying mechanism 8. In this antenna measuring device, the measurement distance r0 between the transmitting antenna 1 and the test antenna 4 can be varied, and the measurement distance r0 can be arbitrarily set according to the size and performance of the test antenna 4. The radiation pattern can then be measured.

[0005]

However, since the conventional antenna measuring device is constructed as described above, the test antenna 4 is not limited to the direct wave from the transmitting antenna 1, but also the ground and surrounding buildings. It also receives the radio waves of the reflected waves reflected by. FIG. 18 shows the radiation pattern (relationship between the received signal amplitude and the rotation angle) of the sample antenna 4 actually measured at a plurality of measurement distances when the measurement distance r0 is changed by the antenna measurement device of FIG. is there. When the measurement distance is different, the influence of the reflected wave changes, so that the radiation pattern fluctuates. FIG. 19 shows the relationship between the received signal amplitude and the measured distance at each rotation angle θ. The direct and reflected waves interfere and the received signal fluctuates periodically. As described above, the conventional antenna measuring device has a problem that the correct radiation pattern cannot be measured due to the influence of the reflected wave.

Also in the conventional antenna measuring device,
A method for reducing the influence of the reflected wave and a method for removing the influence of the reflected wave from the measured value of the radiation pattern are being studied. First
The method is described in “Antenna Engineering Handbook” Chapter 8 Chapter 446
Pp. To 447 "Evaluation of a non-reflecting room" (edited by Institute of Electronics and Communication Engineers, published by Ohmsha Co., Ltd.). This method uses the antenna measuring device shown in FIG. 17 to obtain the relationship between the received signal amplitude and the measuring distance shown in FIG. However, this method has a problem that even if the influence amount of the reflected wave can be evaluated, the influence of the reflected wave cannot be removed or the direction and position of the reflection source cannot be estimated.

The second method is "Operating and Prog
ramming Manual HP8530A Receiver "5-56 (HEWLETT PACK
ARD, HP Part No. 08530-90010 Printed in USA June
1992 Edition 1) Time domain (Time
Domain (Time Band Pass) method. In this method, the radiation pattern of the sample antenna 4 is measured in a wide frequency range, and the measured value is Fourier-transformed to obtain a direct wave with a different amount of time delay from the transmitting antenna 1 to the sample antenna 4. It separates the reflected waves. In this method, it is possible to separate the direct wave and the reflected wave and remove the reflected wave,
Since the resolution of the time delay amount is proportional to the frequency range, it is necessary to perform actual measurement in a very wide frequency range in order to accurately separate and remove reflected waves. However, since the frequency band that can be used by a general antenna is at most about several percent, there is a problem that the reflected wave cannot be separated and removed with high accuracy.

As a method for reducing the frequency range to be measured, for example, "A Superresolution Technique for Antenn"
a Pattern Measurements '' pp. 1532-1537 (Y. Ogawa et al., IEICE TRANS.COMMUN., VOL.E76-B.NO.12 DECEMBER 19
93). However, even in this method, since the frequency range is required for the actual measurement, there is a problem that the reflected wave cannot be separated and removed with high accuracy in the measurement of the radiation pattern of the antenna which operates only in the very narrow frequency range. .

The present invention has been made in order to solve the above problems, and an antenna measurement which can separate and remove the influence of a reflected wave caused by the surrounding environment such as an antenna measurement field from a measured value of a radiation pattern. The purpose is to provide a device. Further, it is an object of the present invention to provide an antenna measuring device capable of estimating the direction and position of a reflection source that generates a reflected wave.

[0010]

In order to achieve the above object, an antenna measuring apparatus according to the present invention is equipped with a test antenna for measuring a radiation pattern, rotating means for rotating the test antenna, and Rotation control means for controlling rotation of the rotating means and extracting rotation angle information from the rotating means, receiving means connected to the test antenna, receiving radio waves received by the test antenna, and transmitting means for transmitting radio waves, The rotation control signal is sent to the transmission antenna, which is connected to the transmission means and is installed opposite to the test antenna, and the rotation control means, and according to the rotation angle information from the rotation control means and the reception signal of the reception means. Equipped with an antenna measuring device having pattern display means for generating and outputting the radiation pattern of the test antenna, or a test antenna for measuring the radiation pattern , Rotating means for rotating the test antenna, rotation control means for controlling the rotation of the rotating means and extracting rotation angle information from the rotating means, and being connected to the test antenna, transmitting radio waves to the test antenna The transmitting means, the receiving means for receiving the received radio wave, the receiving antenna which is connected to the receiving means and is installed so as to face the sample antenna, and the rotation control signal is transmitted from the rotation control means to the rotation control means. An antenna measuring device having a pattern display means for generating and outputting a radiation pattern of a test antenna according to the rotation angle information and the reception signal of the receiving means, between the test antenna and the transmitting antenna, or Measuring distance varying means for varying the distance between the trial antenna and the receiving antenna, and controlling the measuring distance varying means, and measuring from the measuring distance varying means. Measurement distance control means for extracting the distance data, in which and a pattern processing means for processing a plurality of test antenna radiation pattern data at different measurement distances obtained by the pattern display means.

Further, in the antenna measuring apparatus according to the next invention, the pattern processing means obtains a plurality of sample antenna radiation pattern data at different measurement distances obtained by the pattern display means from the measurement distance control means. Fourier transform by, and the direct wave component of the radio wave directly propagating from the transmitting antenna to the test antenna or from the test antenna to the receiving antenna, and the reflected wave component of the radio wave reflected and scattered in the surrounding environment of the antenna measurement field. And to separate.

Further, in the antenna measuring apparatus according to the next invention, the pattern processing means further inverse Fourier transforms the obtained reflected wave component to generate and output a radiation pattern of the reflected wave component.

Further, in the antenna measuring device according to the next invention, the pattern processing means generates and outputs a radiation pattern obtained by averaging a plurality of antenna radiation pattern data of the test antenna at different measurement distances obtained by the pattern display means. To do.

In the antenna measuring apparatus according to the next invention, a receiving antenna having a unidirectional radiation directivity,
Rotation means for mounting the reception antenna and rotating the reception antenna; rotation control means for controlling rotation of the rotation means and for extracting rotation angle information from the rotation means;
A receiving means connected to the receiving antenna for receiving a radio wave received by the receiving antenna; a transmitting means for transmitting the radio wave; and a transmitting antenna connected to the transmitting means and installed to face the receiving antenna. An antenna measuring device having a rotation control signal sent to the rotation control means, and a pattern display means for generating and outputting a radiation pattern of a receiving antenna in accordance with rotation angle information from the rotation control means and a reception signal from the reception means. Or, a transmitting antenna having a unidirectional radiation directivity, a rotating means for mounting the transmitting antenna and rotating the transmitting antenna, and controlling the rotation of the rotating means, and rotating angle information from the rotating means. Revolving base control means for taking out, transmitting means for transmitting radio waves connected to the transmitting antenna, and receiving means installed facing the transmitting antenna Antenna, receiving means for receiving radio waves of the receiving antenna, and a rotation control signal to the rotation control means, and radiation of the receiving antenna according to the rotation angle information from the rotation control means and the reception signal of the reception means. An antenna measuring device having pattern display means for generating and outputting a pattern, the measuring distance varying means for varying the distance between the transmitting antenna and the receiving antenna, and controlling and measuring the measuring distance varying means. Based on the measurement distance controller for extracting the measurement distance data from the distance varying means, and a plurality of receiving antenna radiation pattern data at different measurement distances obtained by the pattern display means,
And a reflection source estimating means for estimating the direction of the reflection source from the main radiation direction.

Further, in the antenna measuring device according to the next invention, the pattern processing means obtains a plurality of sample antenna radiation pattern data at different measurement distances obtained by the pattern display means from the measurement distance control means. Fourier transform by, and the direct wave component of the radio wave directly propagating from the transmitting antenna to the test antenna or from the test antenna to the receiving antenna, and the reflected wave component of the radio wave reflected and scattered in the surrounding environment of the antenna measurement field. And to separate.

In the antenna measuring apparatus according to the next invention, the pattern processing means further inverse Fourier transforms the obtained reflected wave component to generate and output a radiation pattern of the reflected wave component.

Further, in the antenna measuring apparatus according to the next invention, the pattern processing means generates and outputs a radiation pattern obtained by averaging a plurality of sample antenna radiation pattern data at different measurement distances obtained by the pattern display means. To do.

In the antenna measuring device according to the next invention, a receiving antenna having a unidirectional radiation directivity,
Rotation means for mounting the reception antenna and rotating the reception antenna; rotation control means for controlling rotation of the rotation means and for extracting rotation angle information from the rotation means;
A receiving means connected to the receiving antenna for receiving a radio wave received by the receiving antenna; a transmitting means for transmitting the radio wave; and a transmitting antenna connected to the transmitting means and installed to face the receiving antenna. An antenna measuring device having a rotation control signal sent to the rotation control means, and a pattern display means for generating and outputting a radiation pattern of a receiving antenna in accordance with rotation angle information from the rotation control means and a reception signal from the reception means. Or, a transmitting antenna having a unidirectional radiation directivity, a rotating means for mounting the transmitting antenna and rotating the transmitting antenna, and controlling the rotation of the rotating means, and rotating angle information from the rotating means. Revolving base control means for taking out, transmitting means for transmitting radio waves connected to the transmitting antenna, and receiving means installed facing the transmitting antenna Antenna, receiving means for receiving radio waves of the receiving antenna, and a rotation control signal to the rotation control means, and radiation of the receiving antenna according to the rotation angle information from the rotation control means and the reception signal of the reception means. An antenna measuring device having pattern display means for generating and outputting a pattern, the measuring distance varying means for varying the distance between the transmitting antenna and the receiving antenna, and controlling and measuring the measuring distance varying means. Based on the measurement distance controller for extracting the measurement distance data from the distance varying means, and a plurality of receiving antenna radiation pattern data at different measurement distances obtained by the pattern display means,
And a reflection source estimating means for estimating the direction of the reflection source from the main radiation direction.

Further, in the antenna measuring apparatus according to the next invention, the reflection source estimating means measures a plurality of receiving antenna radiation pattern data at different measuring distances obtained by the pattern displaying means from the measuring distance controlling means. Fourier transform is performed on the data, and the direct wave component of the radio wave directly propagating from the transmitting antenna to the receiving antenna is separated from the reflected wave component of the electric wave reflected by the surrounding reflection source. Is inverse-Fourier-transformed to generate and output a radiation pattern of the receiving antenna by the reflected wave component, and the direction of the reflection source is estimated from the main radiation direction of the radiation pattern of the reflected wave component.

Further, in the antenna measuring device according to the next invention, the reflection source estimating means measures a plurality of receiving antenna radiation pattern data at different measuring distances obtained by the pattern displaying means from the measuring distance controlling means. Fourier transform is performed on the data, and the direct wave component of the radio wave directly propagating from the transmitting antenna to the receiving antenna is separated from the reflected wave component of the electric wave reflected by the surrounding reflection source. Inverse Fourier transform is performed to generate and output the radiation pattern of the receiving antenna by the reflected wave component, and the main radiation direction of the radiation pattern of the reflected wave component and the measurement distance data from the measurement distance control means are used to triangulate the reflection source The position is estimated.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1 FIG. 1 in which parts corresponding to those in FIG. 17 are assigned the same reference numerals shows the configuration of Embodiment 1 of the antenna measuring apparatus according to the present invention. In the figure, 1 is a transmitting antenna, and 2 is a transmitter connected to this transmitting antenna 1. 3 is a turntable, and 4 is this turntable 3.
It is a test antenna installed on top of. The transmitting antenna 1 and the test antenna 4 are arranged so as to face each other at a measurement distance r0. Reference numeral 5 is a receiver connected to the test antenna 4, and reference numeral 6 is a rotary base controller which is connected to the rotary base 3 to control the rotation of the rotary base 3 and to extract the rotation angle information from the rotary base 3.

Reference numeral 7 is connected to the receiver 5 and the rotary base controller 6, and generates a radiation pattern of the test antenna 4 from the rotation angle information from the rotary base controller 6 and the received signal from the receiver 5, It is a pattern display device for outputting. 8 is a measuring distance variable mechanism attached under the rotary table 3, 9 is a measuring distance controller for controlling the measuring distance varying mechanism 8, and 10 is this measuring distance controller 9 and a pattern display. 7 is a pattern processor connected to 7 and 7. Further, WD indicates a direct wave from the transmitting antenna 1 to the sample antenna 4, and WR indicates a reflected wave that the radio wave radiated from the transmitting antenna 1 reaches the sample antenna 4 after being reflected on the ground or the like.

Next, the operation will be described. Similarly to the conventional example, the radio wave transmitted from the transmitter 2 is radiated into space from the transmitting antenna 1. The radio wave radiated into this space is received by the test antenna 4 and the reception signal is extracted by the receiver 5. The received signal taken out by the receiver 5 is a signal in which the direct wave WD and the reflected wave WR overlap each other. While receiving in this way, the rotary base 3 is rotated about the y-axis by the rotary base control signal from the rotary base controller 6, and the test antenna 4 mounted on the rotary base 3 is also moved at the same time. Rotate about an axis. The pattern display 7 overlaps the radiation pattern of the direct wave WD and the radiation of the reflected wave WR of the antenna 4 under test with the rotation angle information from the rotary base controller 6 and the received signal at each angle of the receiver 5. Generate and output the emitted radiation pattern.

When the measurement distance r0 between the transmitting antenna 1 and the test antenna 4 is changed under the control of the measurement distance controller 9, the pattern display 7 displays a plurality of measurement distances r0.
The radiation pattern data of the antenna 4 under test is output to the pattern processor 10. Next, the pattern processor 10
Performs the following procedure using the measured distance information from the measured distance controller 9 and the radiation pattern data from the pattern display 7, that is, the received signal from the receiver 5.

(1) First, FIG. 2 shows the relationship between the amplitude of the received signal and the measurement distance r0 for each angle θ. Measuring distance r0
Changes, the received signal becomes exp (jkr0) / r0
(However, j is an imaginary unit and k is a wave number). Therefore, as the measurement distance r0 increases, the amplitude of the received signal gradually changes while varying due to the influence of the reflected wave. Therefore, in the pattern processor 10, the function r0 / exp is added to the radiation pattern data at each measurement distance r0 from the pattern display 7.
Multiply by (jkr0). Function r0 / exp (jkr
The relationship between the amplitude of the received signal multiplied by 0) and the measurement distance r0 is shown in FIG. The received signal multiplied by the function r0 / exp (jkr0) is a constant signal (DC term) due to the direct wave WD and a variation term due to the reflected wave WR superimposed on it.

(2) Next, for each angle θ, the function r0
The received signal multiplied by / exp (jkr0) has a function ex
p [j (2πfr / λ) r0] (λ is the wavelength of the measurement frequency) is multiplied, and Fourier transform is performed at the measurement distance r0. The Fourier-transformed signal (hereinafter referred to as a Fourier spectrum) is a function of the fluctuation frequency fr of the fluctuation term due to the reflected wave, and an example of the Fourier spectrum is shown in FIG. Direct wave W
For D only, the Fourier spectrum is sin [αf
r] / [α · fr] (where α is a real number coefficient) is shown, and the value of the Fourier spectrum at fr = 0 is the direct wave WD
Will indicate the amplitude of. On the other hand, the Fourier spectrum when the reflected wave WR overlaps the direct wave WD is a superposition of the Fourier spectrum of the direct wave WD and the Fourier spectrum of the reflected wave WR.

(3) For each angle θ, fr = 0 of the Fourier spectrum in which the direct wave WD and the reflected wave WR overlap.
Value is taken out, and the radiation pattern of only the direct wave WD is generated and output. Fig. 5 shows the radiation pattern of the direct wave WD.

(4) The Fourier spectrum sin [α · fr] / [α · fr] of the direct wave WD is subtracted from the overlap of the Fourier spectra of the direct wave WD and the reflected wave WR to obtain the Fourier spectrum of the reflected wave WR. Take it out. Figure 6
Shows an example of the Fourier spectrum of the reflected wave WR.

(5) The level of the reflected wave WR with respect to the direct wave WD is calculated and output by comparing the Fourier spectrum of the direct wave WD and the Fourier spectrum of the reflected wave WR. By such processing, the direct wave component and the reflected wave component can be separated from the measured value of the radiation pattern of the test antenna 4, and the radiation pattern of only the direct wave WD can be obtained. Further, the level of the reflected wave WR with respect to the direct wave WD can be known.

Embodiment 2 FIG. FIG. 7 in which parts corresponding to those in FIG. 1 are assigned the same reference numerals shows the configuration of a second embodiment of the antenna measuring apparatus according to the present invention. In the antenna measuring apparatus of the first embodiment, the rotating table 3 is mounted on the measuring distance varying mechanism 8 to change the measuring distance r0, whereas in the second embodiment, the transmitting antenna 1 is mounted on the measuring distance varying mechanism 8. The measurement distance r0 is changed by mounting it on the. Also in the configuration of the second embodiment, as in the first embodiment, the direct wave component and the reflected wave component can be separated from the measured value of the radiation pattern of the test antenna 4 to obtain the radiation pattern of only the direct wave WD. Further, the level of the reflected wave WR with respect to the direct wave WD can be known.

Embodiment 3. FIG. 8 in which parts corresponding to those in FIG. 1 are assigned the same reference numerals shows the configuration of Embodiment 3 of the antenna measuring apparatus according to the present invention, and 11 is a receiving antenna.
In the first embodiment, a radio wave is transmitted from the transmitting antenna 1 to which the transmitter 2 is connected, and a radio wave is received by the test antenna 4 connected to the receiver 5. Then, the radiation pattern of the test antenna 4 is measured in the receiving state.

On the other hand, in the third embodiment, the transmitter 2 is connected to the sample antenna 4, the sample antenna 4 is used in the transmitting state, and the receiver antenna 11 to which the receiver 5 is connected is used.
At, the radio wave transmitted from the test antenna 4 is received. Also in the configuration of this embodiment, the direct wave component and the reflected wave component can be separated from the measured value of the radiation pattern of the test antenna 4 to obtain the radiation pattern of only the direct wave WD, as in the first embodiment. Further, the level of the reflected wave WR with respect to the direct wave WD can be known.

Embodiment 4 FIG. FIG. 9 in which the same parts as those in FIG. 1 are assigned the same reference numerals shows the configuration of an embodiment 4 of the antenna measuring apparatus according to the present invention. The hardware configuration of the antenna measuring device is the same as that of the antenna measuring device of the first embodiment shown in FIG. However, in the fourth embodiment, the processing procedure of the pattern processor 10 is different from that of the first embodiment. The processing procedure of the pattern processor 10 is shown below.

(1) First, as in the first embodiment, the radiation pattern data from the pattern display 7 at each measurement distance r0, that is, the received signal at each measurement distance r0, has a function r0 /
Multiply exp (jkr0).

(2) Next, for each angle θ, the function r0 /
The received signal multiplied by exp (jkr0) has a function exp
[J (2πfr / λ) r0] is multiplied, and Fourier transform is performed at the measurement distance r0.

(3) For each angle θ, fr = 0 of the Fourier spectrum in which the direct wave WD and the reflected wave WR overlap each other.
Value is taken out, and the radiation pattern of only the direct wave WD is generated and output.

(4) The Fourier spectrum sin [α · fr] / [α · fr] of the direct wave WD is subtracted from the overlap of the Fourier spectra of the direct wave WD and the reflected wave WR to obtain the Fourier spectrum of the reflected wave WR. Take it out.

(5) The Fourier spectrum of the reflected wave WR is multiplied by the function exp [-j (2πfr / λ) r0], and the inverse Fourier transform is performed at the fluctuating frequency fr. The obtained function becomes a radiation pattern by the reflected wave WR at each measurement distance r0. An example of the radiation pattern by the reflected wave WR is shown in FIG.

(6) The angles θ1 and θ2 at which peaks appear in the radiation pattern of the reflected wave WR in FIG. 10 indicate the arrival directions of the reflected wave WR. The level of each peak shows the level of the reflected wave WR with respect to the direct wave WD.

By such processing, the direct wave component and the reflected wave component can be separated from the measured value of the radiation pattern of the antenna under test 4, and the radiation pattern of only the direct wave WD can be obtained. Further, the level of the reflected wave WR with respect to the direct wave WD can be known. Further, it is possible to know the arrival direction of the reflected wave WR, that is, the direction of the reflection source.

Embodiment 5 FIG. In the above-described Embodiment 4, the rotating table 3 is installed on the measurement distance changing mechanism 8 and the measurement distance r0 is changed by moving the test antenna 4, but the measurement distance r0 is different from that in the first and second embodiments. Similarly to the above relationship, even if the transmitting antenna 1 is installed on the measuring distance varying mechanism 8 and the transmitting antenna 1 is moved, the direct wave component and the reflected wave component are obtained from the measured value of the radiation pattern of the sample antenna. , And the radiation pattern of only the direct wave WD can be obtained. Further, the level of the reflected wave WR with respect to the direct wave WD and the arrival direction of the reflected wave WR can be known.

Embodiment 6 FIG. Although the test antenna 4 is used in the receiving state in the above-described Embodiment 4, the test antenna 4 is used in the transmitting state as in the case of the relationship between the first and third embodiments. The direct wave component and the reflected wave component can be separated from the measured value of the radiation pattern of No. 4 to obtain the radiation pattern of only the direct wave WD. Also, the direct wave W
The level of the reflected wave WR with respect to D and the arrival direction of the reflected wave WR can be known.

Embodiment 7. The seventh embodiment uses the same hardware configuration as the antenna measuring apparatus of the fourth embodiment described above with reference to FIG. 9, but the processing procedure of the pattern processor 10 is different from that of the fourth embodiment, and the following procedure is executed. Is.

(1) Similar to the fourth embodiment, the function r0 / exp is added to the radiation pattern data from the pattern display 7 at each measurement distance r0, that is, the received signal at each measurement distance r0.
Multiply by (jkr0). Function r0 / exp (jkr
The received signal multiplied by 0) is a constant signal (DC term) due to the direct wave WD and a variation term due to the reflected wave WR superimposed on it.

(2) Next, for each angle θ, the function r0 /
The received signals multiplied by exp (jkr0) are averaged over the measurement distance, and the DC term due to the direct wave WD is taken out.

(3) The direct current term due to the direct wave WD with respect to the angle θ is connected, and the radiation pattern due to the direct wave WD is output.

By such processing, it is possible to obtain the radiation pattern of only the direct wave WD from which the influence of the reflected wave WR of the surrounding environment is removed.

Embodiment 8. In the above-described seventh embodiment, the rotating table 3 is installed on the measurement distance varying mechanism 8 and the measurement distance r0 is changed by moving the test antenna 4, but the first and second embodiments are different from each other. Similarly to the above relationship, even if the transmitting antenna 1 is installed on the measuring distance variable mechanism 8 and the transmitting antenna 1 is moved, only the direct wave WD without the influence of the reflected wave WR of the surrounding environment is removed. The radiation pattern can be obtained.

Embodiment 9 FIG. Although the sample antenna 4 is used in the receiving state in the above-described Embodiment 7, even if the sample antenna 4 is used in the transmitting state as in the case of the relationship between the example 1 and the example 3, even if the sample antenna 4 is used in the surrounding environment, It is possible to obtain the radiation pattern of only the direct wave component without the influence of the reflected wave WR.

Embodiment 10. FIG. 11 in which parts corresponding to those in FIG. 1 are assigned the same reference numerals shows the configuration of an antenna measuring apparatus according to embodiment 10 of the present invention. In the figure, 1 is a transmitting antenna, and 2 is a transmitter connected to this transmitting antenna 1. Reference numeral 4 denotes a test antenna, and the transmitting antenna 1 and the test antenna 4 are arranged so as to face each other at a distance r0. Reference numeral 5 is a receiver connected to the test antenna 4, 7 is a pattern display, 8 is a measurement distance variable mechanism attached below the test antenna 4, and 9 is a measurement for controlling the measurement distance variable mechanism 8. The distance controller 10 is a pattern processor connected to the measurement distance controller 9 and the pattern display 7.

Further, 12 is equipped with a transmitting antenna 1,
A plane scanner 13 for freely moving the transmitting antenna 1 in the vertical direction and the direction orthogonal to the plane of the paper of FIG. 11 is connected to the plane scanner 12, controls the plane scanner 12, and transmits to the pattern display 7. It is a scanner controller that sends the position information of the antenna 1.

In the first embodiment described above, while rotating the rotating table 3 while varying the measuring distance r0 by the measuring distance varying mechanism 8, the radiation pattern of the sample antenna 4 is measured, and the pattern display 7 turns the rotating table 3 on. The radiation pattern according to the rotation angle of is output. On the other hand, in the tenth embodiment, while varying the measurement distance r0 by the measurement distance varying mechanism 8,
The transmission antenna 1 on the flat scanner 12 is moved by the control signal from the scanner controller 13 to move the test antenna 4
Is measured and the radiation pattern corresponding to the position of the transmitting antenna 1 is output from the pattern display 7. The operations of the transmitter 1, the receiver 5, and the pattern processor 10 are similar to those of the first embodiment, and the pattern processor 10 executes the following processing procedure.

(1) Radiation pattern data at each measurement distance r0 from the pattern display 7, that is, each measurement distance r0
The received signal at is multiplied by the function r0 / exp (jkr0). The received signal multiplied by the function r0 / exp (jkr0) is a constant signal (DC term) due to the direct wave WD and a variation term due to the reflected wave WR superimposed on it.

(2) Next, for each position of the transmitting antenna 1, the received signal multiplied by the function r0 / exp (jkr0) is added to the function exp [j (2πfr / λ) r0] (λ is the wavelength of the measurement frequency). ) Is multiplied and the Fourier transform is performed at the measurement distance r0. The Fourier-transformed signal (hereinafter referred to as Fourier spectrum) is a function of the fluctuation frequency fr of the fluctuation term due to the reflected wave WR. In the case of only the direct wave WD, the Fourier spectrum is sin [α · fr] / [α · fr]
(Where α is a real coefficient), the value of the Fourier spectrum at fr = 0 indicates the amplitude of the direct wave WD. On the other hand, the Fourier spectrum when the reflected wave WR overlaps the direct wave WD is a superposition of the Fourier spectrum of the direct wave WD and the Fourier spectrum of the reflected wave WR.

(3) For each position of the transmitting antenna 1, the value at fr = 0 of the Fourier spectrum in which the direct wave WD and the reflected wave WR are overlapped is taken out, and the radiation pattern of only the direct wave WD is generated, Output.

(4) The Fourier spectrum sin [α · fr] / [α · fr] of the direct wave WD is subtracted from the superposed Fourier spectra of the direct wave WD and the reflected wave WR to obtain the Fourier spectrum of the reflected wave WR. Take it out.

(5) The level of the reflected wave WR with respect to the direct wave WD is calculated and output by comparing the Fourier spectrum of the direct wave WD with the Fourier spectrum of the reflected wave WR. By such processing, the direct wave component and the reflected wave component can be separated from the measured value of the radiation pattern of the test antenna 4, and the radiation pattern of only the direct wave WD can be obtained. Further, the level of the reflected wave WR with respect to the direct wave WD can be known.

Embodiment 11 FIG. FIG. 12 in which parts corresponding to those in FIG. 11 are assigned the same reference numerals shows the configuration of Embodiment 11 of the antenna measuring apparatus according to the present invention, and 11 is a receiving antenna. In the tenth embodiment described above, a radio wave is transmitted from the transmitting antenna 1 to which the transmitter 2 is connected, and the receiver 5
The radio wave is received by the test antenna 4 connected to. Then, the radiation pattern of the test antenna 4 is measured in the receiving state.

On the other hand, in this eleventh embodiment, the transmitter 2 is connected to the sample antenna 4, the sample antenna 4 is used in the transmitting state, and the receiver antenna 11 to which the receiver 5 is connected is used. The radio wave transmitted from the trial antenna 4 is received.
In the configuration of this eleventh embodiment as well, similar to the tenth embodiment, the direct wave component and the reflected wave component can be separated from the measured value of the radiation pattern of the test antenna 4 to obtain the radiation pattern of only the direct wave WD. Also, the reflected wave WR for the direct wave WD
Level can be detected.

Embodiment 12 The twelfth embodiment uses the same procedure as that of the fourth embodiment as the processing procedure of the pattern processor 10 instead of the procedure of the tenth embodiment. The processing procedure of the pattern processor 10 is shown below.

(1) Radiation pattern data at each measurement distance r0 from the pattern display 7, that is, each measurement distance r0
The received signal at is multiplied by the function r0 / exp (jkr0).

(2) Next, for each position of the transmitting antenna 1, the received signal multiplied by the function is added to the function exp [j
(2πfr / λ) r0], and Fourier transform is performed at the measurement distance r0.

(3) For each position of the transmitting antenna 1, the value at fr = 0 of the Fourier spectrum in which the direct wave WD and the reflected wave WR overlap is taken out, and the radiation pattern of only the direct wave WD is generated, Output.

(4) The Fourier spectrum of the direct wave WD is subtracted from the Fourier spectrum sin [α · fr] / [α · fr] of the direct wave WD and the reflected wave WR to obtain the Fourier spectrum of the reflected wave WR. Take it out.

(5) The Fourier spectrum of the reflected wave WR is multiplied by the function exp [-j (2πfr / λ) r0], and the inverse Fourier transform is performed at the fluctuating frequency fr. The obtained function becomes a radiation pattern by the reflected wave WR at each measurement distance r0.

(6) The angle at which a peak appears in the radiation pattern of the reflected wave WR indicates the arrival direction of the reflected wave WR. The level of each peak shows the level of the reflected wave WR with respect to the direct wave WD.

By such processing, the direct wave component and the reflected wave component can be separated from the measured value of the radiation pattern of the antenna under test 4, and the radiation pattern of only the direct wave WD can be obtained. Further, the level of the reflected wave WR with respect to the direct wave WD can be known. Further, it is possible to know the arrival direction of the reflected wave WR, that is, the direction of the reflection source.

Embodiment 13. The thirteenth embodiment uses the same procedure as that of the seventh embodiment instead of the procedure of the tenth embodiment as the processing procedure of the pattern processor 10. The processing procedure of the pattern processor 10 is shown below.

(1) When the measurement distance r0 changes, the received signal is exp (jkr0) / r0 (where j is an imaginary unit,
k changes with the wave number). Therefore, as the measurement distance r0 increases, the amplitude of the received signal gradually changes while changing due to the influence of the reflected wave. Therefore, the pattern processor 10 multiplies the radiation pattern data at each measurement distance r0 from the pattern display 7 by the function r0 / exp (jkr0). The received signal multiplied by the function r0 / exp (jkr0) is
It is a constant signal (DC term) due to the direct wave WD and a fluctuation term due to the reflected wave WR superimposed on it.

(2) Next, for each position of the transmitting antenna 1, the received signals multiplied by the function r0 / exp (jkr0) are averaged at the measurement distance r0, and the DC term due to the direct wave WD is taken out.

(3) Output the radiation pattern by the direct wave WD. By such processing, the reflected wave WR of the surrounding environment
It is possible to obtain the radiation pattern of only the direct wave WD from which the influence of is removed.

Embodiment 14. FIG. 13 in which parts corresponding to those in FIG. 1 are assigned the same reference numerals shows the configuration of Embodiment 14 of the antenna measuring apparatus according to the present invention. In the figure, 1 is a transmitting antenna, and 2 is a transmitter connected to this transmitting antenna 1. Further, 3 is a rotary base, and 11 is a receiving antenna installed on the rotary base 3 and having a unidirectional radiation directivity. The transmitting antenna 1 and the receiving antenna 11 are arranged so as to face each other at a distance r0. Reference numeral 5 is a receiver connected to the receiving antenna 11, and reference numeral 6 is a rotary base controller which is connected to the rotary base 3 to control the rotation of the rotary base 3 and to extract rotation angle information from the rotary base 3.

Reference numeral 7 is connected to the receiver 5 and the rotary base controller 6, and generates a radiation pattern of the receiving antenna 11 from the rotation angle information from the rotary base controller 6 and the received signal from the receiver 5, It is a pattern display device for outputting. 8 is the turntable 3
Is a measuring distance variable mechanism attached below, 9 is a measuring distance controller for controlling the measuring distance varying mechanism 8, and 14 is connected to the measuring distance controller 9 and the pattern display 7. It is a reflection source estimator. WD is a direct wave from the transmitting antenna 1 to the receiving antenna 11, WR
Indicates a reflected wave that the radio wave radiated from the transmitting antenna 1 is reflected on the ground or the like and arrives at the receiving antenna 11.

Next, the operation will be described. Radio waves transmitted from the transmitter 2 are radiated into space from the transmitting antenna 1. The radio waves radiated into this space are received by the receiving antenna 11
The reception signal is extracted by the receiver 5. The received signal taken out by the receiver 5 is a signal in which the direct wave WD and the reflected wave WR overlap each other.

While performing the reception as described above, the rotary base 3 is rotated about the y-axis by the rotary base control signal from the rotary base controller 6, and the receiving antenna mounted on the rotary base 3 is rotated. 11 is also rotated about the y-axis at the same time. In the pattern display 7, the radiation pattern by the direct wave WD and the radiation pattern by the reflected wave WR of the receiving antenna 11 are overlapped by the rotation angle information from the rotary base controller 6 and the received signal at each angle of the receiver 5. Generate and output the emitted radiation pattern.

Subsequently, the radiation pattern data of the receiving antenna 11 for a plurality of measuring distances r0 is changed while changing the measuring distance r0 between the transmitting antenna 1 and the receiving antenna 11 under the control of the measuring distance controller 9. Is output to the reflection source estimator 14. Next, the reflection source estimator 14 uses the measured distance information from the measured distance controller 9 and the radiation pattern data from the pattern display 7, that is, the received signal from the receiver 5 to perform the following procedure. .

(1) Radiation pattern data at each measurement distance r0 from the pattern display 7, that is, each measurement distance r0
The received signal at is multiplied by the function r0 / exp (jkr0). The received signal multiplied by the function r0 / exp (jkr0) is a constant signal (DC term) due to the direct wave WD and a variation term due to the reflected wave WR superimposed on it.

(2) Next, for each angle θ, the received signal multiplied by the function is added to the function exp [j (2πfr / λ) r.
0] (where λ is the wavelength of the measurement frequency), and the measurement distance r0
Fourier transform with. Fourier-transformed signal (hereinafter
(Fourier spectrum) is a function of the fluctuation frequency fr of the fluctuation term due to the reflected wave WR. In the case of only the direct wave WD, the Fourier spectrum is sin [α · fr] / [α
・ Fr] (where α is a real number coefficient)
The value of the Fourier spectrum at 0 indicates the amplitude of the direct wave WD. On the other hand, the Fourier spectrum when the reflected wave WR overlaps the direct wave WD is a superposition of the Fourier spectrum of the direct wave WD and the Fourier D spectrum of the reflected wave WR.

(3) The Fourier spectrum sin [α · fr] / [α · fr] of the direct wave WD is subtracted from the overlap of the Fourier spectra of the direct wave WD and the reflected wave WR to obtain the Fourier spectrum of the reflected wave WR. Take it out.

(4) The Fourier spectrum of the reflected wave WR is multiplied by the function exp [-j (2πfr / λ) r0], and the inverse Fourier transform is performed at the fluctuating frequency fr. The obtained function becomes a radiation pattern by the reflected wave WR at each measurement distance r0.

(5) The angle at which a peak appears in the radiation pattern of the reflected wave WR indicates the arrival direction of the reflected wave WR. The level of each peak shows the level of the reflected wave WR with respect to the direct wave WD.

By such processing, the level of the reflected wave WR generated by the surrounding environment can be known. Further, it is possible to know the arrival direction of the reflected wave WR, that is, the direction of the reflection source.

Fifteenth Embodiment This embodiment 15 is shown in FIG.
The same hardware configuration as that of the antenna measuring apparatus according to the fourteenth embodiment shown in FIG. 3 is used, but the processing procedure of the reflection source estimator 14 is different from that of the fifteenth embodiment, and the following procedure is executed.

(1) Radiation pattern data at each measurement distance r0 from the pattern display 7, that is, each measurement distance r0
The received signal at is multiplied by the function r0 / exp (jkr0). The received signal multiplied by the function r0 / exp (jkr0) is a constant signal (DC term) due to the direct wave WD and a variation term due to the reflected wave WR superimposed on it.

(2) Next, for each angle θ, the function r0
The received signal multiplied by / exp (jkr0) has a function ex
p [j (2πfr / λ) r0] (λ is the wavelength of the measurement frequency) is multiplied, and Fourier transform is performed at the measurement distance r0. The Fourier-transformed signal (hereinafter referred to as Fourier spectrum) is a function of the fluctuation frequency fr of the fluctuation term due to the reflected wave WR. In the case of only the direct wave WD, the Fourier spectrum shows a functional form of sin [α · fr] / [α · fr] (where α is a real coefficient), and the value of the Fourier spectrum at fr = 0 is the amplitude of the direct wave WD. Will be shown. On the other hand, the Fourier spectrum when the reflected wave WR overlaps the direct wave WD is a superposition of the Fourier spectrum of the direct wave WD and the Fourier spectrum of the reflected wave WR.

(3) The Fourier spectrum sin [α · fr] / [α · fr] of the direct wave WD is subtracted from the overlap of the Fourier spectra of the direct wave WD and the reflected wave WR to obtain the Fourier spectrum of the reflected wave WR. Take it out.

(4) The Fourier spectrum of the reflected wave WR is multiplied by the function exp [-j (2πfr / λ) r0], and the inverse Fourier transform is performed at the fluctuating frequency fr. The obtained function becomes a radiation pattern by the reflected wave WR at each measurement distance r0.

(5) The angle at which a peak appears in the radiation pattern of the reflected wave WR indicates the arrival direction of the reflected wave WR. The level of each peak shows the level of the reflected wave WR with respect to the direct wave WD.

(6) As shown in FIG. 14, each measurement distance r
Arrival angle θ of the reflected wave obtained in 1 and r2, r3, ...
The position of the reflection source is estimated by the principle of triangulation using 1, θ2, θ3, .... By such processing, the position of the reflection source can be estimated and the level of the reflected wave WR with respect to the direct wave WD can be detected.

[0091]

As described above, according to the present invention, while rotating the sample antenna, the distance between the sample antenna and the transmitting antenna or the receiving antenna can be varied to obtain the pattern display means. By processing multiple antenna radiation pattern data under test at different measurement distances,
It is possible to realize an antenna measuring device that can separate and remove the influence of reflected waves caused by the surrounding environment such as the antenna measurement field from the measured value of the radiation pattern.

According to the next invention, the radiation pattern data of a plurality of test antennas at different measurement distances are Fourier-transformed using the measurement distance data, and the direct transmission between the transmitting antenna or the receiving antenna and the test antenna is performed. By separating the direct wave component of the propagating radio wave and the reflected wave component of the radio wave reflected and scattered in the surrounding environment of the antenna measurement field, the direct wave component and the reflected wave component are measured from the measured value of the radiation pattern of the antenna under test. , The radiation pattern of only the direct wave component can be obtained, and the level of the reflected wave with respect to the direct wave can be detected.

Further, according to the next invention, the obtained reflected wave component is inverse-Fourier-transformed to generate and output a radiation pattern by the reflected wave component. The radiation pattern of the direct wave component can be obtained by separating the radiation pattern of the component and the radiation pattern of the reflected wave component. Further, the level of the reflected wave with respect to the direct wave can be detected, and the arrival direction of the reflected wave, that is, the direction of the reflection source can be estimated.

According to the next invention, a radiation pattern obtained by averaging a plurality of antenna radiation pattern data at different measurement distances is generated and output to directly remove the influence of the reflected wave of the surrounding environment. A radiation pattern of only wave components can be obtained.

According to the next invention, the distance between the sample antenna and the transmitting antenna or the receiving antenna is measured while scanning the transmitting antenna or the receiving antenna on a plane having the sample antenna in the normal line. By varying the value and processing the radiation pattern data of multiple antennas under test at different measurement distances obtained by the pattern display means to measure the effect of reflected waves caused by the surrounding environment such as the antenna measurement field. It is possible to realize an antenna measuring device that can be separated from the antenna and removed.

Further, according to the following invention, the radiation pattern data of a plurality of test antennas at different measurement distances are Fourier-transformed by the measurement distance data to directly connect between the transmitting antenna or the receiving antenna and the test antenna. By separating the direct wave component of the propagating radio wave and the reflected wave component of the radio wave reflected and scattered in the surrounding environment of the antenna measurement field, the direct wave component and the reflected wave component are measured from the measured value of the radiation pattern of the antenna under test. Can be separated to obtain a radiation pattern of only direct wave components. Also, the level of the reflected wave with respect to the direct wave can be detected.

Further, according to the next invention, the obtained reflected wave component is subjected to inverse Fourier transform to generate and output a radiation pattern by the reflected wave component. The radiation pattern of the direct wave component can be obtained by separating the radiation pattern of the component and the radiation pattern of the reflected wave component. Further, the level of the reflected wave with respect to the direct wave can be detected, and the arrival direction of the reflected wave, that is, the direction of the reflection source can be estimated.

Further, according to the next invention, a radiation pattern obtained by averaging a plurality of radiation pattern data of the antenna under test at different measurement distances is generated and output to directly remove the influence of the reflected wave of the surrounding environment. A radiation pattern of only wave components can be obtained.

Further, according to the next invention, while varying the distance between the transmitting antenna and the receiving antenna, based on a plurality of receiving antenna radiation pattern data at different measurement distances obtained by the pattern display means. Thus, by estimating the direction of the reflection source from the main radiation direction, it is possible to realize an antenna measuring device capable of estimating the direction and position of the reflection source where the reflected wave is generated.

According to the next invention, a direct wave component of a radio wave directly propagating from the transmitting antenna to the receiving antenna is obtained by Fourier-transforming a plurality of receiving antenna radiation pattern data at different measuring distances with the measured distance data. And the reflected wave component of the radio wave reflected by the surrounding reflection source are separated, and the obtained reflected wave component is subjected to inverse Fourier transform to generate and output the radiation pattern of the receiving antenna by the reflected wave component. By estimating the direction of the reflection source from the main radiation direction of the radiation pattern of the reflection wave component, the arrival direction of the reflection wave, that is, the direction of the reflection source can be estimated, and the level of the reflection wave with respect to the direct wave can be detected. it can.

Further, according to the following invention, a direct wave component of a radio wave directly propagating from the transmitting antenna to the receiving antenna is subjected to Fourier transform of a plurality of receiving antenna radiation pattern data at different measuring distances by the measuring distance data. And the reflected wave component of the radio wave reflected by the surrounding reflection source is separated, and further the obtained reflected wave component is subjected to inverse Fourier transform to generate and output the radiation pattern of the receiving antenna by the reflected wave component, By estimating the position of the reflection source by triangulation from the main radiation direction of the radiation pattern of the reflected wave component and the measured distance data, the position of the reflection source can be estimated and the level of the reflected wave with respect to the direct wave can be known. You can

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of an antenna measuring device according to the present invention.

FIG. 2 is a characteristic curve diagram showing the relationship between the amplitude of the received signal and the measurement distance r0 for each angle θ.

FIG. 3 is a characteristic curve diagram showing the relationship between the amplitude of the received signal and the measurement distance r0 for each angle θ multiplied by the function r0 / exp (jkr0).

4 is a spectrum distribution diagram showing a Fourier spectrum obtained by Fourier-transforming the reception signal of FIG. 3 at a measurement distance r0.

FIG. 5 is a characteristic curve diagram showing a radiation pattern by a direct wave WD.

FIG. 6 is a characteristic curve diagram showing a radiation pattern by a reflected wave WR.

FIG. 7 is a block diagram showing a configuration of a second embodiment of an antenna measuring device according to the present invention.

FIG. 8 is a block diagram showing the configuration of Embodiment 3 of the antenna measuring device according to the present invention.

FIG. 9 is a block diagram showing a configuration of a fourth embodiment of an antenna measuring device according to the present invention.

FIG. 10 is a characteristic curve diagram showing a radiation pattern by a reflected wave WR.

FIG. 11 is a block diagram showing the configuration of Embodiment 10 of the antenna measuring apparatus according to the present invention.

FIG. 12 is a block diagram showing a configuration of an eleventh embodiment of an antenna measuring device according to the present invention.

FIG. 13 is a block diagram showing the configuration of Embodiment 14 of the antenna measuring apparatus according to the present invention.

FIG. 14 is a schematic diagram for explaining a method of estimating a reflection source position.

FIG. 15 is a block diagram showing a configuration of a conventional antenna measuring device.

16 is a characteristic curve diagram showing a radiation pattern of the test antenna 4. FIG.

FIG. 17 is a block diagram showing the configuration of another conventional antenna measuring apparatus.

FIG. 18 is a characteristic curve diagram showing a radiation pattern of the test antenna 4 when measurement distances are different.

FIG. 19 is a characteristic curve diagram showing the relationship between the amplitude of the received signal and the measurement distance r0 for each angle θ.

[Explanation of symbols]

 1 Transmitting Antenna 2 Transmitter 3 Rotating Table 4 Test Antenna 5 Receiver 6 Rotating Table Controller 7 Pattern Display 8 Measuring Distance Variable Mechanism 9 Measuring Distance Controller 10 Pattern Processor 11 Receiving Antenna 12 Flatbed Scanner 13 Scanner Control Reflector Estimator WD Direct wave WR Reflected wave

Claims (11)

[Claims] 1. A rotation means for mounting a test antenna for measuring a radiation pattern and rotating the test antenna, and a rotation control means for controlling rotation of the rotation means and for extracting rotation angle information from the rotation means. , A receiving means connected to the test antenna and receiving a radio wave received by the test antenna, a transmitting means for transmitting a radio wave, and a transmitter installed facing the test antenna, connected to the transmitting means. A pattern display for transmitting a rotation control signal to the trust antenna and the rotation control means, and for generating and outputting a radiation pattern of the sample antenna according to the rotation angle information from the rotation control means and the reception signal of the reception means. An antenna measuring device having a means or a test antenna for measuring a radiation pattern, and rotating means for rotating the test antenna; Rotation control means for controlling the rotation of the rotation means and for extracting rotation angle information from the rotation means,
For receiving, which is connected to the test antenna and transmits radio waves to the test antenna, receiving means for receiving received radio waves, and which is connected to the receiving means and is opposed to the test antenna. A pattern display means for transmitting a rotation control signal to the antenna and the rotation control means, and for generating and outputting a radiation pattern of the sample antenna according to the rotation angle information from the rotation control means and the reception signal of the reception means. An antenna measuring device comprising: a measuring distance varying means for varying a distance between the sample antenna and the transmitting antenna, or a distance between the sample antenna and the receiving antenna, and the measuring distance varying means. And a different measurement distance obtained by the pattern display means, while controlling the measurement distance control means for extracting measurement distance data from the measurement distance varying means. A plurality of antenna measurement system, characterized in that it comprises a pattern processing means for processing the test antenna radiation pattern data in. 2. The pattern processing means Fourier-transforms a plurality of sample antenna radiation pattern data obtained at the pattern display means at different measurement distances with measurement distance data from the measurement distance control means, The direct wave component of the radio wave directly propagating from the transmitting antenna to the test antenna, or from the test antenna to the receiving antenna, and the reflected wave component of the radio wave reflected and scattered in the ambient environment of the antenna measurement field. The antenna measuring device according to claim 1, wherein the antenna measuring device is separated. 3. The antenna according to claim 2, wherein the pattern processing means further inverse Fourier transforms the obtained reflected wave component to generate and output a radiation pattern by the reflected wave component. measuring device. 4. The pattern processing means generates and outputs a radiation pattern obtained by averaging a plurality of test antenna radiation pattern data at different measurement distances obtained by the pattern display means. The antenna measurement device according to Item 1. 5. The test antenna connected to a test antenna for measuring a radiation pattern, receiving means for receiving radio waves received by the test antenna, transmitting means for transmitting radio waves, and connected to the transmitting means. And a plane scanner means for mounting the transmission antenna, the plane antenna means for moving the transmission antenna on a plane having the antenna under test on the normal line, and the transmission on the plane scanner means. A scanner control unit for controlling the movement of the antenna and for extracting the position information of the transmitting antenna from the plane scanner unit, and transmitting a plane scanner control signal to the scanner controlling unit, and transmitting antenna position information from the scanner controlling unit. Pattern display means for generating and outputting a radiation pattern of the antenna under test according to a signal received by the receiving means Connected to an antenna measuring device having, or a test antenna for measuring a radiation pattern,
Equipped with a transmitting means for transmitting radio waves to the test antenna, a receiving means for receiving radio waves, a receiving antenna connected to the receiving means and installed facing the test antenna, and the receiving antenna. Then, the plane scanner means for moving the receiving antenna on a plane having the test antenna on the normal line, the movement of the receiving antenna on the plane scanner means are controlled, and the receiving from the plane scanner means is performed. Scanner control means for extracting the position information of the antenna for use, and a plane scanner control signal sent to the scanner control means, and the antenna under test according to the reception antenna position information from the scanner control means and the reception signal of the reception means. An antenna measuring device having a pattern display means for generating and outputting a radiation pattern of
Measuring distance varying means for varying the distance between the sample antenna and the transmitting antenna, or between the sample antenna and the receiving antenna, and the measuring distance varying means while controlling the measuring distance varying means. An antenna measurement comprising: a measurement distance control means for taking out measurement distance data from the pattern measurement means; and a pattern processing means for processing a plurality of sample antenna radiation pattern data at different measurement distances obtained by the pattern display means. apparatus. 6. The pattern processing means Fourier-transforms a plurality of sample antenna radiation pattern data obtained at the pattern display means at different measurement distances with measurement distance data from the measurement distance control means, The direct wave component of the radio wave directly propagating from the transmitting antenna to the test antenna, or from the test antenna to the receiving antenna, and the reflected wave component of the radio wave reflected and scattered in the ambient environment of the antenna measurement field. The antenna measuring device according to claim 5, wherein the antenna measuring device is separated. 7. The antenna measuring apparatus according to claim 6, wherein the pattern processing means further inverse Fourier transforms the obtained reflected wave component to generate and output a radiation pattern of the reflected wave component. . 8. The pattern processing means generates and outputs a radiation pattern obtained by averaging a plurality of test antenna radiation pattern data at different measurement distances obtained by the pattern display means. Item 5. The antenna measurement device according to item 5. 9. A receiving antenna having a unidirectional radiation directivity, a rotating means for mounting the receiving antenna, rotating the receiving antenna, and controlling the rotation of the rotating means while rotating the rotating means. A rotation control means for extracting rotation angle information from the receiving antenna, a receiving means connected to the receiving antenna for receiving a radio wave received by the receiving antenna, a transmitting means for transmitting the radio wave, and a receiving means connected to the transmitting means. And a rotation control signal is sent to the rotation control means and the transmission antenna installed opposite to the rotation antenna, and the reception antenna of the reception antenna is received according to the rotation angle information from the rotation control means and the reception signal of the reception means. An antenna measuring device having pattern display means for generating and outputting a radiation pattern, or a transmitting antenna having unidirectional radiation directivity; A rotating means for mounting the transmitting antenna and rotating the transmitting antenna, a rotary base control means for controlling the rotation of the rotating means and taking out rotation angle information from the rotating means, and being connected to the transmitting antenna, Transmitting means for transmitting radio waves, receiving antenna installed facing the transmitting antenna, receiving means for receiving received radio waves from the receiving antenna, and sending a rotation control signal to the rotation control means, An antenna measuring device having pattern display means for generating and outputting a radiation pattern of the receiving antenna according to rotation angle information from the rotation control means and a received signal of the receiving means,
A measuring distance varying means for varying the distance between the transmitting antenna and the receiving antenna; a measuring distance controller for controlling the measuring distance varying means and taking out measured distance data from the measuring distance varying means; An antenna measuring apparatus, comprising: a reflection source estimation unit that estimates the direction of the reflection source from the main radiation direction based on a plurality of reception antenna radiation pattern data at different measurement distances obtained by the display unit. . 10. The reflection source estimation means Fourier-transforms a plurality of reception antenna radiation pattern data obtained at the pattern display means at different measurement distances with measurement distance data from the measurement distance control means, The direct wave component of the radio wave directly propagating from the transmitting antenna to the receiving antenna is separated from the reflected wave component of the electric wave reflected by the surrounding reflection source, and the obtained reflected wave component is inverse Fourier transformed. 10. The antenna measurement according to claim 9, wherein the radiation pattern of the receiving antenna is generated and output by the reflected wave component, and the direction of the reflection source is estimated from the main radiation direction of the radiation pattern of the reflected wave component. apparatus. 11. The reflection source estimation means Fourier-transforms a plurality of reception antenna radiation pattern data obtained at the pattern display means at different measurement distances with measurement distance data from the measurement distance control means, The direct wave component of the radio wave directly propagating from the transmitting antenna to the receiving antenna is separated from the reflected wave component of the electric wave reflected by the surrounding reflection source, and the obtained reflected wave component is inverse Fourier transformed. Then, the radiation pattern of the receiving antenna is generated and output by the reflected wave component, and the position of the reflection source is estimated by triangulation from the main radiation direction of the radiation pattern of the reflected wave component and the measured distance data from the measuring distance control means. The antenna measuring device according to claim 9, wherein: