JPS60132401A - Waveguide type power distributor - Google Patents

Abstract

PURPOSE:To obtain a power distributor having a small connection degree between secondary waveguides by dividing a waveguide with a conductor plate which is vertical to the direction of the electric field of a square waveguide and providing a resistance plate over a primary waveguide and a secondary waveguide having a larger area among those divided waveguides in parallel to the conductor plate. CONSTITUTION:A thin conductor plate is provided to a primary waveguide 1 to divide the waveguide 1 into secondary waveguides 2 and 3. At the same time, a thin resistance plate 5 is set in parallel to the plate 4 and covering both waveguides 1 and 2. The incident wave to the waveguide 1 is distributed in a 2:1 power ratio without receiving any effect of both plates 4 and 5 as long as they have small thickness since the electric field is vertical to both plates 4 and 5. When the secondary waveguide has a reflected wave, a high-degree mode is excited at the waveguide 1. This mode has a field component in the tube axis direction. The high-degree mode can be effectively attenuated by setting the plate 5 at the maximum field position of the high-degree mode. Thus it is possible to obtain a power distributor having a small connection degree of a reflected wave between secondary waveguides.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to improvements in waveguide type power dividers used in microwave bands and millimeter wave bands.

[Prior art]

A conductor plate perpendicular to the direction of the electric field is installed in a rectangular waveguide case.
A waveguide type power divider that distributes four forces can obtain any distribution ratio depending on the position of the conductor plate.

Here, for convenience, a waveguide type power divider that distributes power at a ratio of 2:1 will be described.

First, the conventional waveguide type power divider shown in FIG. 1 will be explained in detail. FIG. 1(,) is a perspective view, and FIG. 1(b) is a front view.

In the figure, (11 is a main waveguide, +21, +31 is a sub-waveguide, and (4) is a thin conductor plate for partitioning the sub-waveguide (21) and the sub-waveguide (31).

In the 11th unit 1, the conductor plate (4) is provided perpendicular to the electric field of the fundamental mode propagating in the main waveguide (11) and so as to divide the cross section 47 of the main waveguide (11 into 2:l). ing.

Therefore, if the conductor plate (4) is sufficiently thin, the fundamental mode power incident on the main waveguide (1) will be affected by the conductor plate (4). (31 and 2=1
distributed in the ratio of

However, in the power divider shown in FIG. 2, if there is a reflected wave in the auxiliary waveguide (21), the main waveguide (21) has a fundamental mode and a higher-order mode LSI, n (n=1. 2.3°...) mode is excited. These higher-order modes are non-propagating modes, and if they are not completely reflected in the main waveguide (old), they are re-reflected to the sub-waveguide (2). Not only is it done.

Also leaks to the sub waveguide (31, sub waveguide '6Ff2+, f
There was a drawback that a bond occurred between 3+.

[Summary of the invention]

This invention aims to eliminate these drawbacks.

A resistor plate is provided in parallel to the conductor plate, spanning the sub-waveguide and the main waveguide, which have a larger cross-sectional area, and will be described in detail with reference to the drawings below.

[Embodiments of the invention]

FIG. 2 shows one embodiment of this invention.

The same figure (1 is a perspective view, and the same figure (b) is a front view. In the figure.

(11 to (4) are the same as in FIG. 1, and are resistance plates provided in parallel to the conductor plate (4), spanning the 51-digit main waveguide fil and the sub-waveguide 121.

In the waveguide type power divider of the present invention, the electric field of the wave incident on the main waveguide (1) is perpendicular to the conductor plate (41) and the resistor plate (51). If the thickness of 51 is thin, it will hardly be affected by these effects.

The power is distributed at a 2:1 power ratio.

If there is a reflected wave in one of the sub-waveguides, Mi, as described in I, the main waveguide (in 11, the higher-order mode LSEln(n
-1, 2, 3...) modes are excited. These modes cover the entire electric field component in the -1f axis direction. FIG. 3 shows the electric field component of the LSBt2 mode, which is the main higher-order mode among the higher-order modes excited in this way. Since the resistance plate (51) is provided on a different surface from the conductor plate, it can be freely positioned in the tube axis direction.
If the resistor plate (51't LSK, 2-mode electric field maximum position is installed), the higher-order mode can be effectively attenuated even if the length of the resistor plate (51 in the tube axis direction is short), and the 2-mode reflected wave can be effectively attenuated. It is possible to obtain a power divider with small coupling between sub-waveguides.

Incidentally, although the case where the power distribution ratio is 2:l has been described, the present invention is not limited to this and may be used in the case of any distribution ratio. In that case, a resistance plate may be provided at the position where the electric field in the tube axis direction of the main higher-order mode generated is at its maximum. - [Effect of the invention] As described above, in the waveguide type power divider according to the present invention, the waveguide with the larger area divided by the conductor plate perpendicular to the direction of the electric field of the rectangular waveguide By providing a resistor plate that spans the main waveguide and the conductor plate in parallel with the conductor plate, there is an advantage that a power divider with small coupling between the sub waveguides can be obtained.

[Brief explanation of drawings]

FIG. 1 shows a conventional rectangular waveguide type power divider. Figure 1 (a) is a perspective view, Figure (b) is a front view +, dz
The figure is a schematic configuration diagram showing an example of this invention.
FIG. 3 is a longitudinal cross-sectional view for explaining the power divider shown in FIG. In the figure, 1lllld leading wave gop, +21. +31 is the sub-waveguide, (4) is the conductor plate, and (51 is the resistor plate. In Figure 9, the same or corresponding parts are indicated by the same reference numerals. Agent Masuo Oiwa Figure 1) (α)

Claims (1)

[Claims] Two sub-waveguides with different cross-sectional areas, each consisting of a rectangular waveguide with a conductor plate parallel to the wide surface of the rectangular waveguide, and a main waveguide connected to the two sub-waveguides. A waveguide-type power divider comprising a wave tube, the sub waveguide having a larger cross-sectional area, and a resistor plate extending from the main wave tube and being provided in parallel with the conductor plate. .