JPH11195924A - Micro-strip array antenna - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the maximum power by separatively arranging plural micro-striplines to which micro-strip radiation elements are connected and independently providing a microwave feeding part to the micro-striplines respectively. SOLUTION: Two systems of micro-striplines 2 are provided on a dielectric substrate 1 and plural branched micro strip radiation elements 3 and independent and pin-shaped microwave feeding parts 4 are respectively provided. The parts 4 are formed in parallel with each other, inserted into a waveguide 6 in parallel with an electric field direction, and connected to microwaves in the waveguide 6. In such a case, the insertion positions of the two parts 4 are located separating them by 1/4 guide wavelength λg from the edge plane of the waveguide 6. When microwaves are supplied to them, microwave power that is about double in total is supplied to the lines 2 of two systems. Then, consequently, the entire maximum power waves are improved by two times.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a type of transmitting / receiving antenna used in a pulse radar device or the like.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microstrip array antenna having a structure in which a microstrip line is divided in order to improve power durability, and a microwave feeding unit is provided in each of the divided microstrip lines.

[0002]

2. Description of the Related Art A typical structure of a conventional microstrip array antenna is shown in FIG. 5, and the prior art is briefly described below. FIG. 5 is a partial schematic diagram of a microstrip array antenna. A plurality of microstrip lines 2 branched on a dielectric substrate 1 and a microstrip radiating element 3 at one end thereof are provided on the same plane by etching. One microwave feeder 4 is provided at the other end of the microstrip line 2. In this example, a coaxial connector is used. Further, a microwave transmitting / receiving unit 5 is connected to the microwave feeding unit 4. When this microstrip array antenna operates for transmission, microwaves are radiated from the microstrip radiating element 3 through the microwave feeder 4 and the microstrip line 2 from the microwave transceiver 5. At this time, the microwave is applied to the microstrip radiating element 3 provided by the microstrip line 2.
Is branched by the number of. This means that the withstand power of the microstrip array antenna is determined by the microstrip line 2.
When the microstrip array antenna operates for reception, the above description is reversed, and the microwaves collected by the microstrip radiating element 3 are passed through the microstrip line 2 via the microwave feed section 4 to the microwave transmitting / receiving section. Sent to 5.

[0003]

However, in the microstrip array antenna described above, the power durability is lower than that of an antenna using a waveguide, and an antenna having a peak power of about several kW is realized. It's just This is because, in the conventional microstrip array antenna, the microwave is supplied to the plurality of microstrip radiating elements 3 by one microwave feeder 4, so that the microstrip line 2 is branched. This is because the overall power durability is also determined by the power durability of the previous microstrip line. An object of the present invention is to solve this problem and to provide a microstrip array antenna having excellent power durability and comparable to an antenna using a waveguide.

[0004]

Therefore, the present invention has solved the above-mentioned problems by the following means. That is, a microstrip line antenna 2 having a microstrip line 2 provided on a dielectric substrate 1, a microstrip radiating element 3 provided at one end of the microstrip line 2, and a microwave feeder 4 provided at the other end. , A plurality of microstrip lines 2 to which the microstrip radiating elements 3 are connected are separately installed, and a microwave feeder 4 is independently installed in each microstrip line 2. is there.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention based on the above means will be described below with reference to FIGS. FIG. 1 is a schematic diagram of a first embodiment of the present invention. The dielectric substrate 1 has a shape orthogonal to the waveguide 6 connected to the microwave transmitting / receiving unit 5. The microstrip line 2 has two systems on the dielectric substrate 1, and has a plurality of branched microstrip radiating elements 3 and one independent microwave feed unit 4. The shape of the microwave power supply unit 4 is a pin shape, installed parallel to each other, inserted into the waveguide 6 parallel to the direction of the electric field, and coupled to the microwave inside the waveguide 6. At this time, the insertion position of the two microwave feeding parts 4 into the waveguide 6 is about λg / 4 from the end face of the waveguide 6, where λg is the guide wavelength in the waveguide 6. Is good. As a result, assuming that a microwave having the same output as the conventional microstrip array antenna is supplied from the microwave transmission / reception unit 5, a total of approximately twice the microwave power is supplied to the two microstrip lines 2. As a result, the overall power durability is improved about twice. In the power withstand test, the conventional microstrip array antenna showed a performance of about 7 kW, whereas in this example, it showed about 13 kW.

FIG. 2 is a schematic diagram of a second embodiment of the present invention. The dielectric substrate 1 has a shape parallel to the waveguide 6 connected to the microwave transmitting / receiving unit 5. Then, the microwave feeding section 4 is directly connected to the microstrip radiating element 3 by the microstrip line 2.
The shape of the microwave feeding part 4 is a pin shape, all of which are installed in parallel with the traveling direction of the waveguide 6, and
And is coupled to the microwave in the waveguide 6. At this time, the insertion position of the plurality of microwave feeding parts 4 into the waveguide 6 is as follows: When λg is the guide wavelength in the waveguide 6, the microwave is located at the position closest to the end face of the waveguide 6. The position of the wave feeder 4 is preferably about λg / 4 from the end face of the waveguide 6, and the position of the microwave feeder 4 subsequent thereto is preferably about λg / 2. In this example, since there are five microstrip lines 2, if a microwave having the same output as the conventional microstrip array antenna is supplied from the microwave transmitting / receiving unit 5,
The microwave power of about 5 times in total is supplied to the microstrip line 2 of the system, and as a result, the overall power durability is improved about 5 times. The number of systems can be set to any number.

FIG. 3 is a schematic diagram of a third embodiment of the present invention. Basically, it is the same as the first embodiment of FIG. 1, and the pin shape of the microwave feeding section 4 forms a coupling loop.

FIG. 4 is a schematic view of a fourth embodiment of the present invention. This is also basically the same as the first embodiment of FIG. 1, except that the dielectric substrate 1 is installed in parallel with the end face of the waveguide 6, and
The microwave feeder 4 is inserted from the end face of the waveguide 6 in parallel with the traveling direction of the waveguide 6. A loop is formed with a length of about λg / 4 from the end face of the waveguide 6.

[0009]

As described above, with the configuration according to the present invention, it is possible to provide a microstrip array antenna having excellent power durability while utilizing the characteristics of a conventional microstrip array antenna.

[Brief description of the drawings]

FIG. 1 is a partial schematic view of a microstrip array antenna according to a first embodiment of the present invention.

FIG. 2 is a partial schematic view of a microstrip array antenna according to a second embodiment of the present invention.

FIG. 3 is a partial schematic view of a microstrip array antenna according to a third embodiment of the present invention.

FIG. 4 is a partial schematic view of a microstrip array antenna according to a fourth embodiment of the present invention.

FIG. 5 is a partial schematic view of a conventional microstrip array antenna.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 dielectric substrate 2 microstrip line 3 microstrip radiating element 4 microwave feeder 5 microwave transmitter / receiver 6 waveguide

Claims (1)

[Claims] 1. A microstrip array antenna in which a microstrip line is provided on a dielectric substrate, a microstrip radiating element is provided at one end of the microstrip line, and a microwave feeder is provided at the other end. A microstrip array antenna, wherein a plurality of microstrip lines to which the microstrip radiating elements are connected are separately installed, and a microwave feeder is independently installed in each microstrip line.