JPH06164214A - Microwave circuit - Google Patents

Abstract

PURPOSE:To provide a microwave circuit which can easily be produced, has an excellent electric characteristic, and can obliquely input a microwave. CONSTITUTION:Two substrates 3 including the strip lines 6 are fixed together with a slanting angle secured between both substrates. Then a connector 1 is set in the same direction as the microwave transmitted through the lines 6. Therefore the electromagnetic mode is converted just once between a connector pin 2 and the lines 6. Furthermore the leakage of the microwave can be reduced at the positions near the connector 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave tester and a microwave circuit used in microwave related equipment.

[0002]

2. Description of the Related Art FIG. 9 is a sectional view showing a conventional microwave circuit, in which 1 is a coaxial connector for connecting a coaxial cable for transmitting microwaves, 2 is a connector pin, 3 is an upper substrate, Reference numeral 4 is a lower substrate. 5 is a triplate line between the upper substrate 3 and the lower substrate 4, 6 is a strip line on the lower substrate 4, 7 is a metal block, 8 is a through hole for conducting the coaxial connector 1 and the metal block 7, and 9a and 9b. , 9c are conductor surfaces.

Next, the operation will be described. Microwaves are input from the upper portion through the coaxial connector 1, transmitted to the triplate line 5 between the upper substrate 3 and the lower substrate 4 through the connector pins 2, and further transmitted to the strip line 6 on the lower substrate 4. At this time, the microwaves convert the electromagnetic field mode between the connector pin 2 and the triplate line 5 and between the triplate line 5 and the strip line 6.

The outer conductor of the coaxial connector 1 to which the coaxial cable is connected shares a ground with the metal block 7 through the through hole 8 through the upper substrate 3 and the lower substrate 4. The upper substrate 3 is provided to prevent microwaves input through the coaxial connector 1 from the vertical direction from leaking between the connector pins 2 and the lower substrate 4. As described above, in the microwave circuit that transmits the microwave to the strip line 6, the microwave is input from the vertical direction through the coaxial connector 1.

[0005]

Since the conventional microwave circuit is constructed as described above, microwaves can only be input in the vertical direction, but not in the oblique direction. In addition, the microwave is converted between the electromagnetic field modes twice between the connector pin 2 and the triplate line 5 and between the triplate line 5 and the strip line 6 to match the electromagnetic field mode. It was difficult. In addition, the coaxial connector 1 and the conductor surface 9
Microwaves leak from the gap with a, the microwaves are attenuated, and when the outer conductor of the coaxial connector 1 and the metal block 7 share the ground through the through hole 8, the upper substrate 3 and the lower substrate 4 are separated from each other. Since it has to be done through, there is a problem in that it is difficult to manufacture.

The invention of claim 1 has been made to solve the above-mentioned problems, and it is possible to input microwaves obliquely, have good electric characteristics, and are easy to manufacture. Aim to get the circuit.

It is an object of the present invention to obtain a microwave circuit capable of matching electromagnetic field modes and having excellent electric characteristics.

[0008]

According to a first aspect of the present invention, there is provided a microwave circuit in which two substrates having strip lines are formed, and a substrate mounting for fixing the two substrates so as to be inclined with respect to each other. A metal block having a surface, a thin conductor for connecting between the strip lines on the two substrates, and a connector having a connector pin joined in the same direction as the strip line and the microwave transmission direction are fixed. And a connector plate attached to the metal block.

A microwave circuit according to the invention of claim 2 is
The two substrates on which the strip lines are formed, the metal block having the substrate mounting surface for fixing the two substrates so as to incline the substrate surfaces, and the strip lines on the two substrates are connected. It is provided with a thin conductor and a branching pattern provided on a strip line which is separated from the connection portion between the strip lines by about ½ of the wavelength of the microwave.

[0010]

In the microwave circuit according to the present invention, the connector pin is joined in the same direction as the microwave transmitting the strip line on the inclined substrate, so that the microwave is obliquely input from the connector. In addition, it eliminates the conversion of electromagnetic field modes between the connector pins and the stripline and eliminates microwave leakage near the connector.

According to the second aspect of the microwave circuit of the present invention, since the branch pattern is provided on the strip line which is separated from the connection portion between the strip lines by about ½ of the wavelength of the microwave, the conductor thin film is formed on the branch pattern. The reflected wave of the microwave whose phase is inverted by is canceled by the maximum value of the microwave to match the electromagnetic field mode.

[0012]

EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a microwave circuit according to an embodiment of the present invention.
Is a coaxial connector (connector) for connecting a coaxial cable that transmits microwaves, 2 is a connector pin,
The connector pin 2 is joined in the same direction as the microwave transmitted through the strip line 6. Reference numeral 3 denotes two substrates having a stripline 6 formed on the upper surface, and 7 denotes a metal having a substrate mounting surface that can join the sides of the two substrates 3 and fix the substrate surfaces so that they are inclined by an angle θ. This is a block, and the board mounting surfaces of the two boards 3 and the metal block 7 are soldered. Reference numeral 10 denotes a connector plate fixed with screws to the connector 1 and further fixed to the metal block 7 with screws, and 11 denotes a strip line 6 on the two substrates 3.
It is a gold ribbon (thin conductor) that connects the two.

Next, the operation will be described. Microwaves are input obliquely from above through the coaxial connector 1, transmitted from the connector pins 2 to the strip line 6 on the substrate 3, and further transmitted to the next strip line 6 via the gold ribbon 11. At this time, since the connection between the connector pin 2 and the strip line 6 is in the same direction as the transmitted microwave, the transmitted microwave does not cause the conversion of the electromagnetic field mode, and the connection between the connector pin 2 and the strip line 6 is further prevented. There is no microwave leakage in the.

Further, since the upper substrate 3 shown in the prior art is not required, the common ground of the outer conductor of the coaxial connector 1 and the metal block 7 can be shared by the screw fixing the connector 1 to the outer conductor of the coaxial connector 1. And the metal block 7 are electrically connected to each other, or the screw for fixing the connector 1 and the screw for fixing the connector plate 10 are electrically connected to each other, so that the ground can be easily made common and the structure can be simplified. It can be easily manufactured.

Example 2. FIG. 2 is an external view showing a microwave multistage amplifying apparatus. In the figure, 1a and 1b are input side connectors and output side connectors, and 12a to 12d are amplifiers, which are configured in four stages. Reference numeral 13 is a case, and 14 is a transistor. Further, in FIG. 3, the amplifier 12b in FIG. 2 is removed and the microwave circuit of the first embodiment is inserted.

Next, the operation will be described. In the microwave multistage amplifying apparatus as shown in FIG. 2, the microwave characteristics of the entire apparatus can be measured from the input side connector 1a and the output side connector 1b, but the amplifier 12a, which is incorporated in the case 13, The individual microwave characteristics of 12b, 12c, and 12d cannot be measured due to the influence of microwaves such as the case 13. However, by inserting a microwave circuit as shown in FIG.
It is possible to measure the microwave characteristics when combining c and 12d. Similarly, if a microwave circuit is inserted in place of the amplifier 12c, the microwave characteristic of the amplifier 12d alone can be measured, and if a microwave circuit is inserted in place of the amplifier 12a, the amplifier 12b can be measured. , 12
It is possible to measure the microwave characteristics when combining c and 12d.

Embodiment 3. In the second embodiment, the case where the microwave circuit is used as the microwave input circuit in the multistage amplifying device has been described. However, as shown in FIG. 4, the microwave circuit is inserted in the middle of the multistage amplifying device. The same effect can be obtained as a microwave output circuit for extracting microwaves.

Example 4. As shown in FIG.
By disposing the microwave input circuit and the microwave output circuit on both sides of b, the microwave characteristic of the amplifier 12b alone can be measured. Also, as shown in FIG.
By connecting the microwave input circuit and the microwave output circuit with the gold ribbon 11 in advance and measuring the microwave characteristic, the microwave characteristic data can be easily calibrated.

Example 5. As shown in FIG. 7, by increasing the angle θ of the metal block 7, the metal block 7 can be incorporated in a multistage amplifier having a small case size. Further, when the coaxial cable is pulled in from above, there is a restriction on the size of the case, and it is effective to use the metal block 7 having a large angle θ.

Example 6. FIG. 8 is a cross-sectional view showing a microwave circuit according to the present invention. In FIG. 8, reference numeral 15 denotes a strip separated from the connection portion of the strip lines 6 of the two substrates 3 by a distance of about ½ of the microwave wavelength λ. It is a branch pattern provided on the line 6. This branch pattern 1
5, the reflected wave of the microwave whose phase is inverted by the gold ribbon 11 can be canceled by the maximum value of the microwave, the electromagnetic field mode can be matched, and the attenuation of the microwave can be reduced.

In the above-mentioned first to sixth embodiments,
Strip line 6 on two substrates 3 with gold ribbon 11
Although the two are connected to each other, a Teflon substrate or a thin copper film may be used depending on the shape and material of the strip line 6.

[0022]

As described above, according to the first aspect of the present invention, the two substrates having the strip lines are fixed so as to be inclined with respect to each other, and the connector pins are transmitted through the microwave lines. Since it is configured to be joined in the same direction as that of the connector, it is possible to input microwaves obliquely from the connector, furthermore, conversion of the electromagnetic field mode between the connector pin and the strip line is eliminated, and the microwave near the connector is eliminated. There is an effect that a microwave circuit can be obtained in which wave leakage is eliminated, electric characteristics are good, and manufacturing is easy.

According to the second aspect of the present invention, the two substrates on which the strip lines are formed are fixed so as to be inclined with respect to the substrate surfaces, and the distance between the strip lines is close to ½ of the microwave wavelength. Since the branch pattern is provided on the strip lines apart from each other, it is possible to cancel the reflected wave of the microwave whose phase is inverted due to the thin conductor on the branch pattern with the maximum value of the microwave to achieve the matching of the electromagnetic field modes. At the same time, there is an effect that the microwave attenuation can be reduced and a microwave circuit having good electric characteristics can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing a microwave circuit according to an embodiment of the present invention.

FIG. 2 is an external view showing a multistage amplifying device for microwaves.

FIG. 3 is an explanatory diagram showing a case where the multi-stage amplifier is used as a microwave input circuit.

FIG. 4 is an explanatory diagram showing a case where the multi-stage amplifier is used as a microwave output circuit.

FIG. 5 is an explanatory diagram showing a case where the multi-stage amplifier is used as a microwave input circuit and a microwave output circuit.

FIG. 6 is an explanatory diagram showing a case where a microwave input circuit and a microwave output circuit are directly connected.

FIG. 7 is a sectional view showing a microwave circuit according to another embodiment of the present invention.

FIG. 8 is a sectional view showing a microwave circuit according to an embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a conventional microwave circuit.

[Explanation of symbols]

 1 Coaxial Connector (Connector) 2 Connector Pin 3 Stripline 6 Board 7 Metal Block 10 Connector Plate 11 Gold Ribbon (Thin Conductor) 15 Branch Pattern

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[Procedure amendment]

[Submission date] February 8, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

[0010]

In the microwave circuit according to the present invention, the connector pin is joined in the same direction as the microwave transmitting the strip line on the inclined substrate, so that the microwave is obliquely input from the connector. It also allows for a single conversion of the electromagnetic field modes between the connector pins and the stripline and reduces microwave leakage near the connector.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

Next, the operation will be described. Microwaves are input obliquely from above through the coaxial connector 1, transmitted from the connector pins 2 to the strip line 6 on the substrate 3, and further transmitted to the next strip line 6 via the gold ribbon 11. At this time, the electromagnetic field mode between the connector pin 2 and the strip line 6 is converted once, and the microwave leakage between the connector pin 2 and the strip line 6 is small .

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

Example 4. As shown in FIG.
By disposing the microwave input circuit and the microwave output circuit on both sides of b, the microwave characteristic of the amplifier 12b alone can be measured. Also, as shown in FIG.
The microwave characteristic data can be easily calibrated by connecting the microwave input circuit and the microwave output circuit with the gold ribbon 11 in advance and measuring the microwave characteristic.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

Example 6. FIG. 8 is a perspective view showing a microwave circuit according to a second aspect of the present invention . In the figure , reference numeral 15 denotes a strip separated from the connection portion of the strip lines 6 of the two substrates 3 by a distance of about ½ of the wavelength λ of the microwave. It is a branch pattern provided on the line 6. This branch pattern 1
5, the reflected wave of the microwave whose phase is inverted by the gold ribbon 11 can be canceled by the maximum value of the microwave, the electromagnetic field mode can be matched, and the attenuation of the microwave can be reduced.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

In the above-mentioned first to sixth embodiments,
Strip line 6 on two substrates 3 with gold ribbon 11
Although there was a connection between the two ,
Use an appropriate conductor ribbon according to the material of the trip line 6.
Just go.

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

[0022]

As described above, according to the first aspect of the present invention, the two substrates having the strip lines are fixed so as to be inclined with respect to each other, and the connector pins are transmitted through the microwave lines. Since it is configured to be joined in the same direction as, it is possible to input microwaves diagonally from the connector. Furthermore, if the electromagnetic field mode conversion between the connector pin and the strip line is made once, /> Both the microwave leakage near the connector is reduced ,
There is an effect that a microwave circuit having good electric characteristics and easy to manufacture can be obtained.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] Figure 8

[Correction method] Change

[Correction content]

FIG. 8 is a perspective view showing a microwave circuit according to an embodiment of the present invention.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of symbols] 1 coaxial connector (connector) 2 connector pin 3 substrate 6 strip line 7 metal block 10 connector plate 11 gold ribbon (thin conductor) 15 branching pattern

[Procedure Amendment 9]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure Amendment 10]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

[Figure 4]

[Procedure Amendment 11]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure Amendment 12]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

[Procedure Amendment 13]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

Claims (2)

[Claims] 1. In a microwave circuit for inputting and transmitting microwaves from a connector, two substrates on which striplines for transmitting the microwaves are formed, and the two substrates are inclined with respect to each other. A connector having a metal block having a substrate mounting surface to be fixed, a thin conductor for connecting striplines on the two substrates, and a connector pin joined to the stripline in the same direction as the microwave transmission direction. And a connector plate fixed to the metal block and attached to the metal block. 2. A microwave circuit for inputting and transmitting microwaves from a connector, wherein two substrates having strip lines for transmitting the microwaves are formed, and the two substrates are inclined with respect to each other. A metal block having a board mounting surface to be fixed, a thin conductor that connects the striplines on the two boards, and a stripline that is separated from the connection between the striplines by about ½ of the microwave wavelength. A microwave circuit comprising: a branch pattern provided on the microwave circuit.