JP2961961B2 - Waveguide switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveguide switch, and more particularly to a mechanical rotation type waveguide used for switching between active and standby microwave and quasi-millimeter wave repeaters, and for selecting and dividing RF channel signals. It relates to a tube switching device.

[0002]

2. Description of the Related Art Generally, a waveguide switch is used for switching between a working and a standby redundant system of a microwave band repeater and a quasi-millimeter wave band repeater. Especially in the case of a transponder for onboard satellites,
In order to enhance the reliability, it is common to employ a working and standby configuration and switch with a waveguide switch. In recent years, examples of using a waveguide switch for switching and division of an RF channel signal in addition to such redundant system switching have been increasing.

Conventionally, this type of waveguide switch has been disclosed in FIG.
As shown in the circuit diagrams of (a), (b) and (c), two D
PDT (Double port Double th
(rough) type waveguide switching devices 31, 32, a hybrid 33, and a waveguide connecting these waveguide elements. The switching states are classified into three types. In the case of the switching state 1 shown in FIG. 3A, the signal input from IN is transmitted through the DPDT waveguide switches 31 and 32 to OUT1.
, And is not transmitted between IN and OUT2. In the case of the switching state 2 in FIG. 3B, the signal input from IN is. The DPDT waveguide switches 31 and 32 are transmitted and selected as OUT2 for output.
During the interval, it is not transmitted. In the case of the switching state 3 in FIG. 3C, the signal input to IN passes through the other path of the DPDT waveguide switch 32 and the waveguide switch 31 to the OU.
It is transmitted to T1 and OUT2. That is, switching state 3
In the case of, the input signal is divided into two and output.

[0004]

The conventional waveguide switching device is used as a switching circuit for switching and splitting a channel signal. This configuration uses the DPD
Since two T-type waveguide switches, one hybrid, and four connection waveguides are required, the configuration becomes complicated, and there is a drawback in that it is not suitable for a small-sized and lightweight satellite-mounted device.

[0005]

According to the present invention, there is provided a waveguide switching device comprising: a fixed annular portion having a waveguide connection portion having four openings connected to an external waveguide; there in a waveguide switch to have a a rotatable cylindrical rotating portion concentrically shaft center is disposed on circle center axis center with a minute gap to the cylindrical hollow portion
And perpendicular to the straight waveguide and the center of this straight waveguide
A three-opening T-branch waveguide having an orthogonal waveguide configured as described above is connected to the tube axis of the linear waveguide and the orthogonal waveguide.
The point of intersection with the pipe axis coincides with the center line of the cylindrical rotating part.
And provided in the cylindrical rotating part and
Corresponding openings are also provided in the cylindrical rotating part, and two openings are provided.
The curved waveguide or curved waveguide to the linear waveguide
Arc in the cylindrical rotary part between the cylindrical rotary part
And two openings corresponding to said two openings
The T-branch waveguide is also provided with a three-
A mouth and any three of the four openings of the waveguide connection portion
Approach each other and stand still across the micro gap
Continuity, and two-way opening of the arcuate waveguide or curved waveguide
A mouth and any adjacent one of the four openings of the waveguide connection portion
And the two apertures approach each other, and
The state of stopping and connecting corresponds to the rotational movement of the cylindrical rotating part.
Thus, Ru are sequentially formed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1A is a front view of an embodiment of the present invention.
FIG. 3B is a cross-sectional view taken along line AA of FIG.
It corresponds to the switching mode of the switching state of (a). FIG.
FIGS. 3A and 3B are cross-sectional views taken along line AA in FIG. 1A, and correspond to the switching modes of the switching states 2 and 3 in FIGS. 3B and 3C, respectively.

1 (a) and 1 (b), the structure of the waveguide switch according to the present embodiment comprises a cylindrical rotating part 1 and a fixed annular part 2. FIG. An arcuate waveguide 21 and a T-branch waveguide 22 are provided in a cylindrical rotating unit 1, and a fixed annular unit 2 is provided.
Are provided with waveguides 11, 12, 13, and 14. An external standard waveguide is connected to each of the waveguides 11 to 14 of the fixed annular portion 2.

Next, three switching modes according to the present embodiment will be described. 1B, a signal is transmitted between the waveguides 14 and 11 by the arcuate waveguide 21. Between the other waveguides, a cylindrical rotating part 1 and a fixed annular part 2
The signal is blocked and not transmitted due to the very narrow gap and low impedance. Therefore, waveguide 1
The signal input to 4 is output to the waveguide 11 side. next,
When the cylindrical rotary unit 1 is rotated by 90 ° counterclockwise from the state shown in FIG. 1B, a switching state 2 shown in FIG. In this case, a signal is transmitted between the waveguide 14 and the waveguide 13 by the circular waveguide 21. The signal is cut off and not transmitted between the other waveguides because of the low impedance as described above. Therefore, the signal input to the waveguide 14 is output to the waveguide 13 side. Further, when the cylindrical rotary unit 1 is rotated by 135 ° counterclockwise from the state of FIG. 2A, the state becomes the switching state 3 of FIG. 2B. In this case, the waveguide 1
The signal input to 4 is split equally by the T-branch waveguide 22 into the waveguide 11 and the waveguide 13 and output.

The waveguide 12 in FIG. 1 is not required to be compared with the conventional circuit function, but can be used for further increasing the number of functions. Although the above description has been made in the form of signal division, it is apparent that the circuit can be used as a signal combining circuit by reversing the input / output relationship.
However, in that case, the two input signals in FIG. 1 must be in phase. In addition, it is clear that the arcuate waveguide 21 may be a curved waveguide, and it is also clear that installing a choke for blocking microwaves is effective.

[0010]

As described above, according to the present invention, the circuit configuration of the prior art is reduced to one waveguide by providing the cylindrical rotating part 1 with the arcuate waveguide 21 and the T-branch waveguide 22. Since this can be realized by a switch, the number of switching system circuit elements in the repeater is greatly reduced, and there is an effect that the whole apparatus can be reduced in size and weight.

[Brief description of the drawings]

FIG. 1A is a front view of one embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along the line AA of FIG.

FIGS. 2A and 2B respectively show switching states 2 and 3 of the present embodiment.

FIG. 3 shows a configuration diagram of a conventional waveguide switch, and FIG.
(B) and (c) show the switching states 1, 2, and 3, respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical rotating part 2 Fixed ring part 11, 12, 13, 14 Waveguide 21 Arc-shaped waveguide 22 T branch waveguide 31, 32 DPDT type waveguide switch 33 Hybrid

Claims (1)

(57) [Claims] 1. A fixed annular portion having a waveguide connection portion with four openings to be connected to an external waveguide, and a cylindrical hollow portion inside the fixed annular portion disposed at a center of a central axis with a minute gap. waveguide switch which have a a rotatable cylindrical rotating portion concentrically axis center is
A linear waveguide and a center of the linear waveguide.
A T-branch waveguide having three apertures and an orthogonal waveguide configured as described above is connected to a tube axis of the linear waveguide and a tube axis of the orthogonal waveguide.
Intersection with the center line of the cylindrical rotating part
Provided in the cylindrical rotating part and corresponding to the three openings
The cylindrical rotating part is also provided with an opening, and an arcuate waveguide or a bent waveguide having two openings is provided in front of the linear waveguide.
Arc-shaped space in the cylindrical rotating part between the cylindrical rotating part
An opening corresponding to the two openings is provided between the circles.
The T-branch waveguide has three openings, which are also provided in the cylindrical rotating part.
And any three of the four openings of the waveguide connection portion.
Are close to each other and are connected stationary with the micro gap
And two openings in the arcuate waveguide or curved waveguide
And any adjacent one of the four openings of the waveguide connection portion.
The two openings approach each other and stand still with the small gap between them
And the state of connection by rotation of the cylindrical rotating portion.
It, waveguide switch according to claim Rukoto is sequentially formed.