JPS58119201A - Waveguide type power distributor - Google Patents

Abstract

PURPOSE:To reduce the coupling between subwaveguides and to decrease the loss, by providing a coupling hole, about 1/2 wavelength in length, orthogonal to the axial direction at a 1/4 guide-wavelength or below from the tip of the conductor plate distributing power and fitting a resistive plate to the coupling hole. CONSTITUTION:The conductor plate 4 is provided vertically to an electric field of the basic mode propagating in a main waveguide 1 so as to divide the height of a waveguide 1 into two equally. The coupling hole 6 is about 1/2 wavelength in the length and placed at a location, 1/4 guide wavelength or below from the tip of the conductor plate 4. The resistive plate 7 is fitted to a part or all of the coupling hole 6. Thus, the electromagnetic wave of the basic mode incident to the waveguide 1 is equally divided into subwaveguides 2 and 3 without being affected with the coupling hole 6. Then, the coupling between the waveguides 2 and 3 is reduced. Since the axial length of the resistive plate 7 is short, the power loss of the basic mode is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention uses microwave distortion and IJ
6 J rIIlt type power distribution device.

Figure 1 shows the conventional Mansugi power divider. l1t-
FIG. In Figure 1, (1) is King 4at
, 121r! Sub-conductor fffA, 131rX sub-conductor 121
Tube B.

(4) is a thin conductor plate for separating the conductor tA 121 and the sub-conductor tB t31.

@1 In the figure, the 4-body plate (4) a is the fundamental mode propagating inside the main waveguide fil. Therefore, the conductor plate 14) is extremely thin and the IL is the main waveguide 1114c.
The incident photonic mode A conductor plate (41) is not completely affected by the waveguide A (21) and the glJ waveguide B (31).

In the power divider shown in FIG.
i 4-mode μ excitation rLzu-TE 1 (1+ TM
+n (n = 1, 2 +---・-1 mode is excited rL b o these jL modes are non-propagating modes, sub-fourth pipe A (2) and ill m tjji pipe B (
3), there is a problem that coupling occurs between the sub-waveguides due to complete reflection.

For this reason, the conventional power divider has a structure in which a resistor plate (51?) is provided at the tip of the conductor plate (4) as shown in Fig. 2, which absorbs the reflected waves and improves the coupling between the sub-waveguides. However, in conventional power dividers, it is safe to lengthen the VCA resistor plate 15+'i in order to reduce the cross section between sub-waveguides, and the problem of large loss in the power divider for the fundamental mode has been solved. there were.

9% request to solve this problem sound 55-084587
It has already been proposed to install a resistor sheet metal at a position approximately at the wavelength within the tube from the tip of the conductor plate, but with this structure, the coupling between the sub-waveguides is insufficient due to the influence of susceptance determined by the non-propagating mode due to reflected waves. The problem is that you can't make it smaller, either.

This invention eliminates the drawbacks of ACN et al., and provides a coupling hole perpendicular to the tube axis direction with a length of about 3A, at a position less than % of the pipe wavelength from the tip 111 of the entire conductor plate, and a part of the coupling hole. Or, the whole thing is equipped with resistor sheet metal, and the drawings will be explained in detail below.

FIG. 8 is a perspective view showing an embodiment of the present invention. (1
1 to (4) are the same as in Figure 1, 161rI binding hole,
(7) In the power divider of the present invention, which is a first-order resistor plate attached to the μ coupling hole (6), the fundamental mode incident on the main waveguide 111 is not affected by the coupling hole (6) and is Wave tube A121. Divide into two equal parts into sub waveguide B (3).

- If there is a reflected wave in the sub-waveguide of 10,000 μ, as mentioned above, the leading tIIL lightning 111 becomes a non-propagating mode and coupling occurs between the tubes.To reduce this coupling, μ, the sub-waveguide Just rL is designed to minimize the reflection when At2+ and Bt31 are excited in the opposite phase. Sub-waveguide A i2+ ,
The equivalent circuit when anti-phase excitation is applied to B +31' is shown in FIG. Since the line is terminated at the capacitive susceptance B determined by the sub-waveguide A121°B +31H non-propagating mode, the position below % of the tube wavelength from the tip of the conductor plate 14) is inverted phase excitation. This is the maximum current point during pregnancy. In addition, the susceptance B is determined by the size of the coupling hole (6).

Therefore, the coupling hole (6) is placed in the above position.
) is approximately 3 to make the susceptance B, zero.
A wavelength is set, and the resistance value of the resistor is set to the optimum value. You can go down a little.

FIG. 5 is a graph showing coupling characteristics between sub-waveguides in the power divider having the structure shown in FIG. 48. Connection a between minor groove V pipes
The power divider of the present invention also has the advantage that the length of the resistance plate (7) in the tube axis direction is short, and the power loss in the fundamental mode is small. be.

In addition, although the above discussion has been made regarding the multi-shaped guide tube, this invention is not limited to the Lrc, but can be applied to other shapes of guide tubes such as circular guide tubes without any problems. In the waveguide type power divider according to the invention, a coupling hole having a length of approximately 3A and perpendicular to the tube axis direction is formed in the conductor plate that partitions the tube.

The resistor plate is provided at the following position from the tip Im of the conductor plate to the wavelength within the tube, and the resistor plate is provided on the same plane as the entire conductor plate in part or all of the coupling hole, l) The coupling between the sub-waveguides is small. , and there is an advantage that a power divider with less loss can be obtained.

[Brief explanation of drawings]

si diagramμ Perspective view of conventional multi-conductor type power divider, 2nd
The figure shows a square four-tube power divider equipped with a conventional resistance plate.
+ Inkstone drawing, $3 figure a A perspective view of a rectangular four-tube type power divider according to an embodiment of the present invention. Figure 4 μ is a diagram for explaining the operation of the power divider of this invention, and l! FIG.
Leading party, 12+r [opening (N”#A, (3+(1
Sub-conductor Fj[B, +4+rc conductor plate, +51rJ resistance plate, +61r! Resistance plate with V installed in M dowel hole, 17+H sweet hole 16), B1. B2H susceptance,
In Figure 9, where Ri has low resistance, the portion corresponding to the same wart vc
What is the same sign for n? Agent Makoto Kuzuno - Figure 1, Figure 2, Figure 3! 4rIA Figure 5 Frequency (G+-1t)

Claims (1)

[Claims] Does a conductive sheet metal film generate electricity in the direction perpendicular to the direction of the electric field? A waveguide type power divider [ν, the conductor plate iC approximately 3A
A iiB stand-hole hole perpendicular to the tube axis direction having a length tfM length is provided at a position below the tube wavelength from the tip of the conductor plate, and a resistor plate is provided in a part or the entire bottom of the connection hole. A waveguide type power divider characterized in that it is provided on the same surface as the conductor plate.