JPH03210804A - Waveguide-microstrip line converter - Google Patents

Abstract

PURPOSE:To facilitate the manufacture of the converter and to improve the reliability by supporting the center conductor of a coaxial line with an insulator, providing a gold (Au) pattern to part of the insulator, and connecting the center conductor and a microstrip line via the Au pattern. CONSTITUTION:A throughhole 11 of an insulator 10 and a center conductor of a hermetic glass terminal 4 are fitted to press-fit the insulator to support the center conductor 5. Succeedingly, the center conductor 5 and a microstrip line 9 on a ceramic substrate 2 are connected by bonding an Au ribbon 8 via an Au pattern provided to the insulator 10. Then the center conductor 5 is supported by the insulator 10 and the center conductor 5 and the microstrip line 9 are connected by the Au pattern 12. Thus, the manufacture is facilitated and the reliability is improved.

Description

[Detailed description of the invention] [Table of contents] Overview Industrial field of application Prior art (Figure 3) Means for solving the problems to be solved by the invention (Figure 1) Working examples (Figure 2) ) Effects of the invention [Summary] With regard to a waveguide-microstrip line converter, the purpose of the present invention is to facilitate the production of the converter and to improve its reliability. In a waveguide-to-microstripline converter that performs conversion, the center conductor of the coaxial line is supported by an insulator (dielectric), and a gold (Au) pattern is provided on a part of the insulator. The center conductor and the microstripe line are configured to be connected through the pattern.

[Industrial application field]

The present invention relates to a waveguide-to-microstrip line converter, and more specifically, in various ultra-high frequency devices, the input and output thereof require a waveguide system, and furthermore, the present invention relates to a waveguide-to-microstrip line converter. The present invention relates to a waveguide-to-microstripline converter for use in performing conversion via a vertical coaxial line, and in particular to facilitate fabrication and improve reliability.

[Conventional technology]

Conventionally, for example, in a waveguide semiconductor device, a coaxial waveguide conversion is performed by using a coaxial glass terminal and coupling it with the electric field inside the waveguide, and the converted high frequency is
The microstrip line is transmitted to a semiconductor device composed of a patterned ceramic substrate and a semiconductor element.

Thereafter, the high frequency output from the semiconductor device is converted into a coaxial waveguide in the same way as when it was input.

Figure 3 is a block diagram of a conventional waveguide-microstrip line converter, in which (A) is the casing before assembly, (B) is a cross-sectional view of the hermetic glass terminal, and (C) is after assembly. A perspective view, (D) is a sectional view taken along the line ST in FIG. 3(C).

In the figure, l is the housing, 2 is the ceramic substrate patterned with microstrip lines, 3 is the hole, 4 is the hermetic glass terminal, 5 is the center conductor, and 6 is the insulator (dielectric).
, 7 is an outer conductor, 8 is a gold (AU) ribbon, and 9 is a microstrip line.

A conventional waveguide-to-microstripline converter is fabricated as follows.

First, a hole 3 into which a hermetic glass terminal 4 is inserted is provided in a housing 1, and a ceramic substrate 2 patterned with a microstrip line 9 is provided on the housing l.

Next, the hermetic glass terminal 4 is inserted into the hole 3 from the bottom surface of the housing 1 (the side opposite to the ceramic substrate) and fixed with solder, gold-tin alloy, or the like.

In this case, the hermetic glass terminal 4' has a center conductor 5 at its center, and an outer conductor (earth side) 7 is provided at a part of the outside thereof with an insulator 6 interposed therebetween, forming a coaxial line. The outer conductor 7 has a large diameter portion in part, and this large diameter portion comes into contact with a step provided on the bottom side of the hole 3 and is fixed as shown in FIG.

Next, at the center of the hole 3, a gold (Au) ribbon 8 is used to bond between the center conductor extending to the top surface of the casing (ceramic substrate side) and the microstrip line 9 on the ceramic substrate 2. Connecting.

The waveguide-microstrip line converter assembled in this way has the configuration shown in FIGS. (C) and (D). As is clear from FIG. is microstrip line 9
The connecting portion side (top side of the casing) protrudes into the center of the hole 3, and there is nothing around it.

[Problem to be solved by the invention]

The above-mentioned conventional devices had the following drawbacks.

(1) The center conductor 5 of the hermetic glass terminal 4 and the microstrip line 9 on the ceramic substrate 2 are connected by bonding a gold ribbon 8.

However, this part is a type of antenna and requires a high level of skill to manufacture. However, the area near the connection of the central conductor 5 has no support around it, so it may swing around during work. is difficult.

(2) Since the gold ribbon 8 described above is extremely thin, it may break if, for example, the center conductor 5 moves. Furthermore, the center conductor 5 may come into contact with the housing 1, which poses problems in terms of manufacturing and reliability.

It is an object of the present invention to overcome these conventional drawbacks, to facilitate the manufacture of a waveguide-to-microstrip line converter, and to make it highly reliable.

[Means to solve the problem]

FIG. 1 is a diagram showing the principle of the present invention; (A) is a perspective view of an insulator, (B) is a perspective view of a hermetic glass terminal, and (C) is a perspective view of a hermetic glass terminal.
The figure is a perspective view after assembly. In the figure, the same reference numerals as in FIG. 3 indicate the same parts. In addition, 10 is an insulator (dielectric), 11
12 indicates a through hole for inserting the center conductor 5, and 12 indicates a gold pattern.

In order to achieve the above object, the present invention provides a waveguide-to-microstrip line converter that performs conversion from a waveguide to a microstrip line via a perpendicular coaxial line. The central conductor 5 is supported by an insulator (dielectric) 10, and a gold (Au) pattern 12 is provided on a part of the insulator 10, and the central conductor 5 is supported through the gold (Au) pattern 12. and a microstrip line 9 are connected.

[Effect]

Since the present invention is configured as described above, it can be manufactured, for example, as follows.

First, a gold (A u ) pattern 12 is formed on a part of the insulator 10.
Next, the hermetic glass terminal 4 is inserted into the hole of the housing 1 from the bottom surface in the same manner as in the conventional example, and then the insulator 1o is inserted from the top surface of the housing l.

In this case, the through hole 11 of the insulator 1O and the center conductor of the hermetic glass terminal 4 are fitted, and the insulator 10 is press-fitted so as to support the center conductor 5.

Next, the center conductor 5 and the microstrip line 9 on the ceramic substrate 2 are connected using gold (A) provided on the insulator 10.
u) Connect by bonding gold (AU) ribbon 8 through pattern 12;

Therefore, the center conductor 5 is supported by the insulator 10, and the connection between the center conductor 5 and the microstrip line 9 is made through the gold (Au) pattern 12, which makes manufacturing easy and highly accurate. can.

This converter performs coaxial waveguide conversion by coupling the center conductor 5 with the electric field in the waveguide, and the converted high frequency is transmitted from the center conductor 5 through the microstrip line 9 to the semiconductor device. Ru. Thereafter, the high frequency wave output from the semiconductor device is converted into a coaxial waveguide in the same manner as described above.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 2 is a block diagram of one embodiment of the present invention, in which (A) is the casing before assembly, (B) is a plan view of the insulator, and (C) is (B
) is a cross-sectional view taken along the line A-B in the figure, (D) is a plan view of the hermetic glass terminal, (E) is a cross-sectional view taken along the line M-N in (D), and (F) is a cross-sectional view after assembly. 0, the same reference numerals as in FIGS. 1 and 3 indicate the same parts.

In this embodiment, an insulator (dielectric) 10 is fitted to the center conductor 5 of the hermetic glass terminal 4 constituting the coaxial line to support the center conductor 5, and the insulator 1O and the ceramic substrate A gold (Au) pattern 12 is provided on a part (top surface) of the insulator 10 to facilitate connection with the microstrip line formed on the insulator 2.

A waveguide-microstrip line converter having such a configuration is manufactured as follows.

First, as shown in (A), a hole 3 for inserting a hermetic glass terminal 4 and an insulator 10 is provided in a part of the housing 1, and a ceramic substrate 2 with a microstrip line formed on the upper surface of the housing 1 is provided. .

Further, the cylindrical insulator 10 is provided with a through hole 11 in its center that is large enough to insert the center conductor 5 of the hermetic glass terminal 4, and furthermore, a part of the upper surface of the insulator 10 is made of gold (Au). ) Pattern 12 is formed by plating or the like.

The hermetic glass terminal 4 is the same as the conventional example, and has a structure in which a central conductor 5 is provided in the center, and an outer conductor 7 is provided around a part of it with an insulator (dielectric) 6 interposed therebetween. .

The hermetic glass terminal 4 is inserted into the hole 3 from the bottom surface (the side opposite to the ceramic substrate 2) of the casing 1 shown in (A) above and fixed with gold-tin alloy, etc. The insulator 10 is inserted (press-fitted) into the hole 3 from the side.

In this case, the central conductor 5 is inserted into the through hole 11 so as to fit into it, and the gold (Au) pattern 12 is inserted to the outside.

Next, the center conductor 5 and the microstrip line formed on the ceramic substrate 2 are connected by bonding via a gold (Au) pattern 12 using a gold (AU) ribbon 8.

The cross section of the transducer thus manufactured is as shown in (F). That is, since an insulator 10 is provided around the center conductor 5 and is press-fitted inside the hole 3, the center conductor 5 is fixed so as not to move.

〔Effect of the invention〕

As explained above, the present invention has the following effects.

(1) Since the center conductor of the coaxial line is firmly supported by an insulator, there is no possibility of the plug moving as in the past.

Therefore, when connecting the center conductor and the microstrip line, work becomes easier and manufacturing becomes easier.

(2) Because the center conductor is supported by an insulator,
It will no longer move during use, and the gold ribbon will not break.
Do not touch the casing.

Therefore, the reliability of the converter is improved.

(3) Since the center conductor of the coaxial line and the microstrip line are connected through the gold pattern provided on the insulator, the connection work is easy and a strong connection can be achieved.

Therefore, a highly accurate converter that is easy to manufacture can be obtained, and reliability is also improved.

[Brief explanation of drawings]

FIG. 1 is a principle diagram of a waveguide-microstrip line converter according to the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, and FIG. 3 is a block diagram of a conventional example. 1 - Housing 2 - Ceramic substrate 4 - Hermetic glass terminal 5 - Center conductor 10 - Insulator 12 - Gold (A u ) pattern

Claims (1)

[Claims] In a waveguide-to-microstrip line converter that performs conversion from a waveguide to a microstrip line via a coaxial line perpendicular to the microstrip line, the center conductor (5) of the coaxial line is an insulator (dielectric). Further, a gold (Au) pattern (12) is provided on a part of the insulator (10), and the microstrip is connected to the center conductor (5) via the gold (Au) pattern (12). 1. A waveguide-microstrip line converter, characterized in that a waveguide-microstrip line converter is connected to a line.