JPH0435503A - Band splitting filter device - Google Patents

Abstract

PURPOSE:To miniaturize the device and to reduce the cost by providing a waveguide- coaxial converter for converting each polarized wave from both sub-waveguides of a polarization coupler into a coaxial mode from a waveguide mode, respectively, and a coaxial line type power synthesizer for synthesizing these coaxial mode outputs. CONSTITUTION:The device is provided with a waveguide type polarization coupler 7 for branching a necessary polarized wave by a pair of sub-waveguides 9a, 9b, 12a and 12b coupled by a coupling part, respectively on the opposed faces of a main waveguide 8. Also, this device is provided with waveguide-coaxial converters 15a, 15b, 16a and 16b for converting each polarized wave from both sub-waveguides of the polarization coupler 7 into a coaxial mode from a waveguide mode, respectively, and coaxial line type power synthesizers 23, 24 for synthesizing a coaxial mode output from each waveguide-coaxial converter. Moreover, this device is provided with at least two pairs or more of coaxial line type branching filters 25 - 27, 31 - 33 whose branching frequency bands are different, connected to the cutput terminal side of the coaxial line type power synthesizer. In such a way, the device can be miniaturized, constitution parts which require precise working are decreased, and the cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a group demultiplexing device that demultiplexes signals according to vertical and horizontal polarization sides and frequency bands in microwave or millimeter wave frequency bands. It is.

[Prior Art] Fig. 3 shows a 4GH!
2 shows a configuration diagram of a group demultiplexing device for the 5 GHz band, 5 GHz band, and 6 GHz band. In the figure, 1 has a diameter of 69 m.
2 is a circular one-sided conversion waveguide connected to the circular waveguide 1 and converts the waveguide shape from circular to square; 3 is the circular one-sided conversion waveguide 2; 6G connected to
H2 band group splitter, 4 is the 6 GH! 4 GH with 3 band group splitters connected! The band group splitter is 4 GH! Band group splitter is connected to 4GHx band and 5GH! Separate the bands 4
The GH2 band cutoff section is a 5GHx band splitter connected to the 4GH2 band cutoff section 5. Each group branching filter 3, 4.6 has a rectangular main wave pipe 3a, 4a, 6a, and a close-coupling directional coupling part is connected to one opposing surface of each main wave pipe 3a, 4a, 6a. A pair of rectangular sub-waveguides 3b and 3c are attached to take out vertically polarized waves (hereinafter referred to as V-polarized waves).
, 4b, 4c, 6b, 6c, and each main waveguide 3a, 4a,
A pair of rectangular sub-waveguides 3d, 3e, 4d, and 4e are attached to the other opposing surfaces of 6a via a close-coupling directional coupling part and extract horizontally polarized waves (hereinafter referred to as H-polarized waves). ,6
d, 6e and one corresponding sub-waveguide 3b, 3c, 4b
, 4°.

Connect the outputs of 5b and 5c with waveguides 3f, 3g, and 4
f.

4g, 6f, 6g, a waveguide type power combiner 3h consisting of a waveguide type magic T, etc., which is guided and synthesized via 6g.

4h, 6h, V polarization ends 3i, 4i, 6i provided at the output end of each power combiner 3h, 4h, 6h, and the other corresponding sub waveguide 3d, 3e, 4d, 4e.

Connect the outputs of 6d and 6e to waveguides 3j, 3, and 4j.

4, a waveguide type power combiner 3 consisting of a waveguide type magic T or the like that guides and synthesizes the power through 6j and 6k.

4℃, 6℃, and each power combiner 3℃, 4. e, 6. It is composed of H polarization ends 3m, 4m, and 6m provided at the output end of i2. The 4GHz band cutoff section 5 includes main waveguides 4a and 6.
4 GH when connecting a! Although the band is blocked, 5 GH2
A main aperture waveguide 5a and corresponding sub-waveguides 4b and 6b are constricted to allow the band to pass through.

Connecting 4c and 6c, 4d and 6d, 4e and 6e, 4
GO! It is composed of sub-diaphragm waveguides 5b, 5c, 5d, and 5e that are constricted to block the band but allow the 5GH2 band to pass through.

Next, the operation of this group branching device will be explained using received waves. 4 transmitted from a receiving antenna (not shown) to the circular waveguide 1
GH2 band, 5GH! Obi and 6GH! The transmission mode of the ■ polarization and H polarization of each band is converted from the circular TE□ mode to the square TE1o mode by the circular one-sided conversion waveguide 2, and the 6 GH! Band group demultiplexer 3 is installed. here,
The V-polarized wave of the 6GH2 band is coupled to the sub-waveguides 3b and 3C, which are coupled via the directional coupling portions provided in pairs on the upper and lower surfaces of the main waveguide 3a, and then to the connecting waveguide. pipe 3f
, 3g to the power combiner 3h, where the power is combined and output to the polarization end 31. Similarly, the 6Gh band H polarized wave is coupled to sub-waveguides 3d and 3e, which are provided in pairs on the left and right surfaces of the main waveguide 3a and coupled via a directional coupling portion, respectively. , are guided to a power combiner 3° C. via connecting waveguides 3j and 3k, where power is combined and outputted to an H polarization end 3m.

4 GO! remaining in the main waveguide 3a. Obi and 5GH! ■ of the obi
The polarized waves and H polarized waves are first divided into 4 GH2 band group splitter 4, then 4 GHK band V polarized waves and half of H polarized waves and 5G) 1
A part of the V polarized wave and the H polarized wave of the two bands are combined at each directional coupling part and guided to the sub waveguides 4b, 4c, 4d, and 4e.
The signal is propagated to the GHX band cutoff section 5 and transmitted through the sub-diaphragm waveguides 5b and 5e.
, 4GH with 5d, 5e! Only the band is totally reflected, 5 GH2
The belt passes and 5GH! Sub-waveguides 6b and 6e of band splitter 6
, 6d, and 6e.

On the other hand, the V and H polarizations of the 4GH2 band and the V and H polarizations of the 5GH2 band remaining in the main waveguide 4a without being coupled are 4
It is propagated to the GH2 band cutoff section 5 side and is transmitted to the main aperture waveguide 5a.
The GH2 band is totally reflected and returned to the group demultiplexer 4 for the 4 Gtb band, and the sub-waveguides 4b, 4c,
4d, 4e, and first sub-waveguides 4b, 4c, 4
It is combined with the 4GH 2 band combined wave coupled to d and 4e to form one combined wave. This coupled wave is transmitted through the connecting waveguide 4f,
Power combiner 4h, 4β via 4g, 4j, 4k
The signals are combined for each polarized wave and output to the V-branch end 41 and the H-branch end 4m.

Next, the remaining 5GH2 band V polarization and H polarization that passed through the main aperture waveguide 5a of the 4GH2 band cutoff section 5 and were guided to the 5GH2 band group demultiplexer 6 are transmitted to each directional coupling section. It is combined and guided to the sub-waveguides 6b, 6c, 6d, and 6e, and is combined with the already combined combined wave of the 5GHx band to form the V branching end 61 and the H
It is output to the branching end 6m.

The above is an explanation of the operation of the received wave, but the reversibility theorem holds true for the transmitted wave, and the operation at each branch end 3 is completely opposite to that of the received wave.
Transmission waves input from i, 3m, 4i, 4m, 6i, and 6m are combined by this device, guided to the circular waveguide l, and transmitted toward the antenna.

[Problems to be Solved by the Invention] In such a conventional group demultiplexer, a waveguide-type group demultiplexer 3.4.6 must be provided for each frequency band. It also requires a shaped 4GH2 band cutoff section 5, which makes the entire device very large, and when it is incorporated as an antenna power feeding device, the support mechanism becomes large and there are problems with poor workability. In addition, in such a structure, there are many components that require precise processing accuracy, such as the three types of waveguide-shaped directional couplers and the waveguide-shaped 4GH2 band cutoff section 5, which increases processing costs. There was a problem with the high price.

The purpose of the present invention is to achieve miniaturization; 1. Another object of the present invention is to provide a group demultiplexing device that can reduce the number of component parts that require precision machining and reduce the cost.

[Means for Solving the Problems] To explain in detail the present invention for achieving the above object, the group branching filter according to the present invention has two main waveguides each coupled by coupling portions on opposing surfaces of the main waveguide. A waveguide type polarization demultiplexer that separates a required polarized wave using a pair of auxiliary waveguides, and converts each polarized wave from the auxiliary waveguide of the polarization demultiplexer from a waveguide mode to a coaxial mode. a coaxial line-type power combiner that combines the coaxial mode outputs from each of the waveguide-coaxial converters; It is characterized by comprising at least two or more connected coaxial line type duplexers having different demultiplexing frequency bands.

[Operations] According to such a structure, a common polarization demultiplexer is used instead of a waveguide type group demultiplexer for each frequency band, so that the device can be miniaturized.

In addition, with this structure, only one type of waveguide type directional coupling part is required, eliminating the need for a waveguide type 4GH2 band cutoff part, reducing the number of components that require precision machining, and reducing costs. Price can be reduced.

In particular, if a coaxial line type power combiner is used, the size can be further reduced than if a waveguide type power combiner is used.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. Note that parts corresponding to those in FIG. 3 described above are designated by the same reference numerals.

FIGS. 1 and 2 show an embodiment of a group branching device according to the present invention. In the group demultiplexing device of this embodiment, the output end of the circular one-sided conversion waveguide 2 has a 4 GH2 band,
5GHz band and 6GH! A common polarization splitter 7 is provided to separate the V-polarized wave and the H-polarized wave of the band.

The polarization splitter 7 has a rectangular main waveguide 8 connected to a circular one-sided waveguide 2 . On the upper and lower surfaces of the main wave tube 8,
A pair of sub-waveguides 9a and 9b are provided for extracting V-polarized waves. The main waveguide 8 and the sub-waveguides 9a, 9b are coupled by directional coupling portions 11a, llb consisting of rows of coupling holes 10a, 10b provided in opposing portions of the two. Furthermore, a pair of sub-waveguides 12a and 12b for extracting H-polarized waves are provided on the left and right surfaces of the main waveguide 8. The main waveguide 8 and the sub waveguides 12a, 12b are coupled by directional coupling portions 14a, 14b consisting of rows of coupling holes 13a, 13b provided in opposing portions of the two.

The transmission mode of the V-polarized waves coupled to the upper and lower sub-waveguides 9a and 9b is converted from the waveguide mode to the coaxial mode by the waveguide-coaxial converters 15a and 15b, respectively, and is transmitted to the coaxial cables 17a and 17b. It is now output.

The H polarized waves coupled to the left and right sub-waveguides 12a and 12b are
The transmission mode is converted from a waveguide mode to a coaxial mode by waveguide-coaxial converters 16a and 16b, respectively, and output to coaxial cables 18a and 18b.

The V-polarized waves transmitted to the coaxial cables 17a and 17b are aligned in phase by the phase adjustment units 19a and 19b, and are combined by the coaxial line type power combiner body 21 of the same phase and same amplitude type (Wilkinson type). ing. That is, the sub waveguide 9
The V-polarized waves coupled to a and 9b have the same amplitude, but their transmission phases vary because they pass through the waveguide-coaxial converters 15a and 15b and the coaxial cables 17a and 17b. The phases are aligned by the phase adjustment sections 19a and 19b, and when the same phase and the same amplitude are obtained, the coaxial line type power combiner main body 21 synthesizes the signals. These phase adjustment sections 19
a, 19b and the coaxial line type power combiner body 21 constitute a coaxial line type power combiner 23 with a phase adjustment function.

Similarly, the H polarized waves transmitted to the coaxial cables 18a and 18b are aligned in phase by the phase adjustment units 20a and 20b, and are combined by the coaxial line type power combiner body 22 of the same phase and same amplitude type. There is. In this case as well, the phase adjustment sections 20a, 20b and the coaxial line type power combiner main body 22 constitute a coaxial line type power combiner 24 with a phase adjustment function.

These coaxial line type power combiners with phase adjustment function 23゜24
In principle, the Magic T has the function of absorbing and attenuating the circular TE2□ mode and the circular TMo1 mode, which are unnecessary modes of the antenna feeding system, and is designed to perform exactly the same function as the waveguide Magic T. It has become.

At the output end of the coaxial line type power combiner 21-, a coaxial line type 25 for the 6GH2 band, an open coaxial line type 26 for the 5Gh band, and a coaxial line type splitter 27 for the 4GHK band are provided. is connected. Each of the coaxial line type branching filters 25 to 27 is a coaxial line type circulator 25a.

26a, 27a, and coaxial line type bandpass filter 25b
, 26b, and 27b. The band-pass filter 25b passes V-polarized waves in the 6GIIz band, the band-pass filter 26b passes V-polarized waves in the 5G)lx band, and the band-pass filter 27b passes V-polarized waves in the 4Glb band. There is. 6G in the bandpass filter 25b
f (a z-band wave edge 28 is provided, and a bandpass filter 26
5 GH for b! A band wave edge 29 is provided, and a 5GHx band wave edge 30 is provided in the band pass filter 27b.

A coaxial line type splitter 31 for the 6GHx band, a coaxial line type splitter 32 for the 5GHx band, and a coaxial line type splitter 33 for the 4GIh band are connected to the output end of the coaxial line type power combiner 24. has been done. Each of the coaxial line type branching filters 31 to 33 is a coaxial line type circulator 31a.

32a, 33a, and coaxial line type bandpass filter 31b
, 32b, and 33b. The bandpass filter 31b is 6GH! The band pass filter 32b passes the H polarized wave of the 5GH2 band, and the band pass filter 33b passes the H polarized wave of the 5GH2 band. It is designed to pass H-polarized waves. 6GH for the bandpass filter 31b!
A band wave end 34 is provided, a 5G[b band wave end 35 is provided in the band pass filter 32b, and a 5GH2 band wave end 36 is provided in the band pass filter 33b.

Next, the operating principle of such a group splitting device will be explained using received waves. 4GH2 band and 5G transmitted through circular waveguide 1
■Polarized waves and H polarized waves in the Hx band and 6GHx band are converted into circular T, which is the fundamental mode of the circular waveguide, by the circular one-sided conversion waveguide 2.
E, mode to rectangular T, which is the fundamental mode of the rectangular waveguide.
It is converted into E10 mode and guided to polarization demultiplexer 7. In this polarization splitter 7, the V-polarized waves are coupled by the directional coupling parts 11a and llb having a coupling degree of about -3 dB, and the sub-waveguide 9
a, 9b, and the H polarized waves are coupled by directional coupling parts 14a, ], 4b having a coupling degree of about -3 dB, and guided to sub waveguides 12a, 12b.

The V-polarized waves coupled to the sub-waveguides 9a, 9b are
The coaxial cable 17a is converted from the waveguide mode to the coaxial mode by the coaxial converters 15a and 15b.

17b, the phases are aligned in the phase adjustment parts 19a and 19b, and the coaxial line type power combiner main body 2 is in the state of the same phase and the same amplitude.
1 is synthesized. Similarly, the H polarized waves coupled to the sub-waveguides 12a, 12b are transferred to the waveguide-coaxial converters 16a, 16b.
The waveguide mode is converted into a coaxial mode, the phases are aligned in the phase adjustment parts 20a and 20b via the coaxial cables 1.8a and 18b, and the signals are combined in the coaxial line type power combiner main body 22 with the same phase and the same amplitude. Ru.

■Polarized wave and H polarized wave of coaxial mode are 6G) b band.

5G) Duplexer 25.31 for each 1x band and 4GIh band,
The signals are separated at 26.32 and 27.33, and output to the branching ends 28.34, 29.35, and 30°36 of each frequency band.

In this explanation, the order of demultiplexing for each band is 6 GH! band.

5GH! Obi, 4GH! This can be set arbitrarily.

The above is an explanation of the operation for received waves, but when this device is used for transmission, the terminals 27c of the 4GH2 band coaxial line type circulators 27a and 33a.

33c, each branching end 28, 34, 29.
The V and H side waves of each band input from 35, 30, and 36 are combined, guided to the circular waveguide 1, and transmitted toward the antenna. In this case, the power combiner bodies 21 and 22 described in connection with the received waves operate as a power divider body.

[Effects of the Invention] As explained above, in the group demultiplexer according to the present invention, a common polarization demultiplexer is used instead of a waveguide type group demultiplexer for each frequency band. Miniaturization can be achieved. In addition, in the present invention, only one type of waveguide type directional coupling part is required, eliminating the need for a waveguide type 4GH2 band cutoff part, etc.
The number of components that require precision machining is reduced, making it possible to lower prices. In particular, since the present invention uses a coaxial line type power combiner, there is an advantage that it can be made more compact than one using a waveguide type power combiner.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of a group demultiplexing device according to the present invention,
FIG. 2 is a partially cutaway perspective view showing the polarization splitter used in this embodiment, and FIG. 3 is a configuration diagram of a conventional group splitter. 1...Circular waveguide, 2...Circular one-sided conversion waveguide,
7... Polarization splitter, 8... Main wave tube, 9a, 9b
, 12a, 12b-・Sub waveguide, lla, llb,
14a. 14 b...Directional coupling portion, 15a, 15b, 16
a. 16b--Waveguide-coaxial converter, 17a, 17b. 18a, 18b - coaxial cable, 19a, 19b. 20a, 20b... Phase adjustment section, 21.22... Coaxial line type power combiner main body, 23.24... Coaxial line type power combiner, 25-27. 31-33... Coaxial line type power combiner Duplexer, 25a to 27a, 31a to 33a... Coaxial line type circulator, 25b to 27b, 31b to 33b
・・・Coaxial line type band pass filter, 28~30.34
~36... Branch end. Figure 1 Figure 2

Claims (1)

[Claims] 1, each coupled by a coupling part on the opposite surface of the main waveguide.
A waveguide type polarization demultiplexer that separates a required polarized wave using a pair of sub waveguides, and converts each polarized wave from both of the sub waveguides of the polarization demultiplexer from a waveguide mode to a coaxial mode. a coaxial line-type power combiner that combines the coaxial mode outputs from each of the waveguide-coaxial converters; A group branching device comprising at least two connected coaxial line type branching filters having different branching frequency bands.