JPH0212726Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a coaxial/stripline connection structure for converting and coupling a coaxial line and a stripline in parallel.

[Prior Art and Its Disadvantages] When connecting a coaxial line and a stripline, the most important thing is to minimize the loss during coupling. If the coupling loss is large, there are drawbacks such as poor workability or limited installation procedures.

Conventionally, this connection has been made by frequently using metal or Teflon screws in the input circuit to maintain sufficient ground contact, or by direct soldering.

However, with this method, it is necessary to bring the ground plane in close contact with the front surface, which results in poor workability and cannot be realized stably during mass production.

[Purpose of the invention] The present invention was made in view of the above points, and its purpose is to create a coaxial line that can stably connect a coaxial line and a stripline with low loss and is suitable for mass production. The object of the present invention is to provide a stripline connection structure.

[Main points of the invention] This invention is applicable to coaxial lines of isolators, for example.
When connecting the stripline formed on the SHF board, a recess is provided at the bottom of the casing, an isolator is installed in this recess, an isolator mounting seat is installed, and the SHF board is attached to the bottom of the casing with a ground plane. Attach the isolator so that they are in close contact with each other, and support one end of the isolator with the isolator mounting seat. and,
Solder the stripline on the SHF board and the center conductor of the isolator's coaxial line. moreover,
A non-metallic holding plate is fixed to the top of the isolator, a non-metallic adjusting screw is attached to one end of the holding plate, and the SHF board is held down on the isolator mounting seat by the tip of this adjusting screw. By adjusting this adjustment screw, the holding strength of the holding plate is adjusted.

[Embodiment of the invention] An embodiment of the invention will be described below with reference to the drawings. FIG. 1 shows an exploded perspective view of a coaxial/stripline connection structure. In the same figure,
Reference numeral 11 denotes a housing made of aluminum die-casting, and in this housing 11, an isolator 12 is installed.
The coaxial line of the SHF board 13 is coupled to the stripline of the SHF board 13.

2 and 3 show this isolator 12 and
It shows the structure after bonding the SHF substrate 13. That is, as shown in FIG. 3, a recess 14 is provided at the bottom of the casing 11 on the wall surface side, and the isolator 12 is installed in this recess 14. The center conductor 15a on the input side of the isolator 12 is led out from the wall surface of the housing 11.

The concave portion 14 of the housing 11 further includes an L-shaped portion 16.
An isolator mounting seat 16 having a diameter of 1.a is installed on the side surface of the isolator 11 in a state where it is screwed with a screw 22. On the bottom of the housing 11
An SHF board 13 is attached, and one end side of this SHF board is supported by an isolator mounting seat 16. This SHF board 13 is attached with non-metallic screws 2 so that its ground surface is in close contact with the bottom surface of the housing 11.
Fixed by 3. Furthermore, the isolator 12
The center conductor 15b on the output side of is inserted through the hole 16b provided in the L-shaped part 16a of the isolator mounting seat 16 and connected to the stripline 17 of the SHF board 13.
Solder 18 is attached to.

The end of the SHF board 13 on the isolator 12 side is attached to the adjustment screw 1 on the isolator mounting seat 16.
9 and 19. These adjustment screws 19, 19 are made of resin and are attached to one end of the board holding plate 20. This board holding plate 20 is made of resin such as ABS resin,
The other end has a screw 21 attached to the top of the isolator 12.
It is fixed in place.

In this way, in this connection device, the presser plate 2
0. Since the support members such as the adjustment screw 19 are made of non-metallic material, the coaxial line/stripline 1
The coupling loss between 7 can be small. Further, an isolator mounting seat 16 is provided, and on this isolator mounting seat 16, the stripline 17 of the SHF board 13 and the center conductor 15b of the isolator 12 are connected, and the adjustment screws 19, 19
Since the SHF board 13 is mechanically supported, the SHF board 1 on the isolator mounting seat 16 is
By designing in advance the height of the mounting portion on which the isolator 3 is attached to be the same as the depth of the recess 14, the isolator mounting seat 16 can be attached to the recess 1 without the need for adjustment.
4 and the bottom of the housing 11 to ensure a secure fit.
The SHF board 13 can be mounted and fixed, providing stability and excellent mass productivity.

[Effects of the invention] As described above, according to the invention, there is less loss when converting and coupling the coaxial line and the stripline, and the coaxial line and the stripline are mechanically stable and suitable for mass production. Can provide connection structure.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a coaxial/stripline connection structure according to an embodiment of the present invention, Fig. 2 is a plan view showing the configuration of the main parts of the device after assembly, and Fig. 3 is the same as Fig. 2. FIG. 11... Housing, 12... Isolator, 13...
...SHF board, 14... recess, 15a, 15b...
...Center conductor, 17...Stripline, 18...
...Solder, 19...Adjustment screw, 20...Press plate.

Claims (1)

[Scope of utility model registration request] a housing; a recess provided at the bottom of the housing;
A rectangular parallelepiped-shaped isolator having a coaxial line and having a coaxial input terminal at one end and an output terminal at the other end is installed in the recess, and the isolator is installed in the recess together with the isolator and is fixed to the input terminal side of the isolator. In addition, the mounting base has a mounting portion having the same height as the bottom of the casing, and a strip line, which is attached in close contact with the bottom of the casing, and one end of which is attached to the mounting base as described above. a printed circuit board supported by the mounting section; a coupling means for coupling the stripline of the printed circuit board to the center conductor of the coaxial line serving as the input end of the isolator; A coaxial/strip line connection structure comprising a holding plate and a non-metallic adjustment screw attached to one end of the holding plate to adjust the strength of holding the printed circuit board.