JPH0444402A - Coaxial/waveguide converter - Google Patents

Abstract

PURPOSE:To realize a coaxial/waveguide converter with high accuracy and improved workability by arranging an adjustment screw closest to a coaxial connector onto the center line of a waveguide and 2nd and 3rd adjustment screws to each side of the center line of the waveguide in opposite to each other. CONSTITUTION:An adjustment screw 10a is arranged on a center line of a waveguide and adjustment screws 10b, 10c are arranged opposite by to each side of the center line of the waveguide. Through the arrangement above, the distance between the adjustment screws 10a, 10b and the distance between the adjustment screws 10a, 10c are selected respectively large.

Description

[Detailed description of the invention] [Summary] Regarding a coaxial-waveguide converter equipped with three or more posts whose insertion length into the waveguide can be varied from the outside of the waveguide, a special tool is used. In order to provide a coaxial-to-waveguide converter that can be easily and precisely adjusted without having to Place the second closest post on the right or left side away from the waveguide centerline, and the third closest post on the opposite side of the waveguide centerline from the second post. Configure.

[Industrial application field]

The present invention relates to a coaxial-to-waveguide converter including three or more posts whose insertion length into the waveguide can be varied from the outside of the waveguide.

As the performance of wireless devices increases, it has become necessary to precisely adjust impedance in coaxial-waveguide converters.

This impedance adjustment is performed by adjusting the insertion length l of the adjustment screw into the waveguide.

FIG. 3 is a diagram illustrating the adjustment screw, which is used as a post. After adjusting the insertion length l of the screw 11, it is fixed with a small washer 12, a spring washer 13, and a nut 14.

FIG. 4 is a diagram illustrating the electric field distribution within the waveguide 1, where the electric field strength is lowest at both ends and has a maximum point at the center.

If you insert the adjustment screw at this maximum point, the shortest insertion length l
The maximum impedance adjustment effect can be obtained.

In this way, if a plurality of adjustment screws are provided at the point where the maximum impedance adjustment effect is obtained, the adjustment screws will be too close to each other, making adjustment difficult.

There is a need for a coaxial-to-waveguide converter that can easily and reliably adjust such adjustment screws.

[Conventional technology]

FIG. 5 shows a diagram illustrating a conventional example.

The conventional example shown in the figure has three adjustment screws 10a to 10C.

The more the adjustment screws 10a and 10c are located away from the center line, the longer the insertion length l needs to be made, and as the insertion length l becomes longer, the loss increases, so the adjustment screw 10a
, 10c are desirably located close to the center line, and the intervals between 10a and 10b, and between 10b and 10c are made as small as possible within a range where the nuts do not come into contact with each other.

[Problem to be solved by the invention]

When arranged as in the conventional example shown in FIG. 5, the center adjusting screw 10b cannot be turned with a normal spanner, so a special spanner or radio pliers is used.

However, even with such tools, in narrow gaps,
Since the adjustment is delicate, it takes a long time to make the adjustment.

An object of the present invention is to provide a coaxial-waveguide converter that can be easily and precisely adjusted without using special tools.

[Means to solve the problem]

FIG. 1 shows a detailed illustration of the invention.

1 in the principle diagram of the present invention shown in FIG. 1 is a waveguide, and I
A is a flange of the waveguide 1, 2 is a coaxial connector, 10A, 10B, 10C are first, second and third posts for adjusting impedance, and the first post 10
A on the center line of the waveguide 1, the second post 10B on the right or left side of the center line of the waveguide l, and the third post 10C
A means for solving this problem is to arrange the second post 10B on the opposite side of the center line of the waveguide l.

[Function] The first post 10A is placed on the center line of the waveguide 1, the second post 10B is placed on the right or left side of the center line of the waveguide 1, and the third post 10C is placed on the second post 10B. By arranging the position opposite to the center line of the waveguide 1, the gap between the first post 10A and the second post 10B, the first post 1
The gap between the first post 10A and the third post 10C can be increased without using special tools.
A, it becomes possible to fix the second boss l-10B and the third post 10C.

The solid line coaxial connector 2 in the principle diagram of Fig. 1 is a vertical conversion,
The broken line coaxial connector 2' indicates the mounting position when performing horizontal conversion.

〔Example〕

The gist of the present invention will be specifically explained below with reference to an embodiment shown in FIG.

FIG. 2 shows a detailed illustration of the invention.

The configuration shown in FIG. 2 is the same as the conventional example explained in FIG. 5, and is composed of a waveguide 1, a flange IA of the waveguide 1, a coaxial connector 2, and adjustment screws 10a, 10b, and 10C.

The adjusting screw 10a is placed on the center line of the waveguide 1, and the adjusting screws 10b and 10c are placed on opposite sides of the center line of the waveguide 1.

With such an arrangement, the adjustment screw 10a and the adjustment screw 10b are more convenient than the conventional example explained in FIG.
The distance between the adjustment screw 10a and the adjustment screw 10c can be increased.

FIG. 2 shows fixation using the spanner 3, and while holding the head of the adjustment screw with a screwdriver or the like, rotate the spanner 3 by an angle θ to fix the adjustment screw.

By arranging the adjustment screws as described above, it becomes possible to fix with a normal spanner, and the adjustment value does not change due to rotation of the adjustment screw when fixing, improving work efficiency. .

〔Effect of the invention〕

According to the present invention as described above, the adjustment screw closest to the coaxial connector is placed on the center line of the waveguide, and the second and third adjustment screws are placed across the center line of the waveguide. By arranging them on the opposite side, it is possible to provide a coaxial-waveguide converter with high precision and improved workability.

[Brief explanation of drawings]

Figure 1 is a diagram explaining the present invention in detail. Figure 2 is a diagram explaining the invention in detail. Figure 3 is a diagram explaining the adjustment screw. Figure 4 is a diagram explaining the electric field distribution in the waveguide. FIG. 5 is a diagram illustrating a conventional example. In the figure, 1 is a waveguide, IA is a flange, 2.2' is a coaxial connector, 10A to 10C are posts, 10a, 10b, 10c are adjustment screws, 11 is a screw, 12 is a small washer, 13 is a spring washer , 14 represents Nando's, and 14 represents Nando's, respectively. The entire θ month's skin, Chiri and blind area U month Figure 1/l, BuC September implementation 4ri・1 and the ``Short Ming country'' Figure S circumambulation and a prayer wave explaining In the area f) Electric field area and ΦΣ say September

Claims (1)

[Claims] In a coaxial-waveguide converter including three or more posts (10) whose insertion length into the waveguide (1) can be varied from the outside of the waveguide (1), a coaxial connector ( 2) on the center line of the waveguide (1), and the second post (10A) closest to the waveguide (1) on the center line of the waveguide (1).
0B) to the right or left side away from the center line of the waveguide (1), and a third post (10C) closest to the second post (10B) to the right or left side of the waveguide (1). ) A coaxial-to-waveguide converter, characterized in that the converter is disposed on the opposite side of the center line of the waveguide.