JPS6110301A - High frequency switching device - Google Patents

Abstract

PURPOSE:To obtain a switching device with less insertion loss, high speed and high reliability by providing M-set of phase shifters between the 1st circuit of N input and M output and the 2nd circuit of M input and N output so as to change the phase shift amount of said phase shifter. CONSTITUTION:An input signal from an input terminals 11-13 is fed to distributers 41-43 with phase weighting and its output is fed to mixers 51-53. The disttributers 41-43 and the mixers 51-53 constitute the 1st circuit. An output of the 1st circuit is fed to the 2nd circuit (comprising mixers 54-56 and distributers 44-46 with phase weighting) having opposite input/output to the 1st circuit via the phase shifters 61-63 and an output is obtained from output terminals 21-23. Then the phase shift amount of the phase shifters 61-63 is changed to change the connection between the input terminals 11-13 and the output terminals 21- 23. Thus, the loss is reduced and high speed switching is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a high frequency switching device for switching high frequency signals.

[Technical background of the invention and its problems]

FIG. 4 shows a typical matrix type switching device among high frequency switching devices that connect the respective terminals of N terminal groups R and N' terminal groups T. In FIG. 1, 1 is a terminal group R, and 2 is a terminal group T, for example. Further, 3 indicates a unit switch element.

Such a multi-terminal high frequency switching device is an important device in the fields of high frequency measurement devices and microwave communications. In particular, in recent years, with the development of satellite communication technology, S/T
DMA (8atel ite switch
d-Time Division Multiple A
(ccess) communication system has come into use, and the importance of multi-terminal high frequency switching devices is increasing. In other words, in the 88/TDMA communication system, the receiving device connected to terminal group R in FIG. Achieves split communication.

Among the performance requirements for a high frequency switching device used for such purposes, the following are particularly important. ■High-speed switching possible, ■Low insertion loss, ■Large eintracheon, and ■High reliability.

The above characteristics are determined by the characteristics of the switching elements that constitute the switching device.

Conventionally, the following two types of switching elements are typical.

1. Mechanical Switch Element 2. Semiconductor Switch Element Mechanical switch elements have low insertion loss and excellent isolation characteristics, but they have problems with high speed and durability. Furthermore, although semiconductor switching elements are excellent in high speed and durability, they have problems such as insertion loss at high frequencies and poor isolation.

Furthermore, in the configuration of the switching device, in the matrix switching circuit system, one switch corresponds to one switching element, which requires a complicated preliminary circuit to increase the reliability of the switching device, which increases the size of the entire device. , many problems such as weight increase occurred.

[Purpose of the invention]

This invention improves the drawbacks of the above-mentioned far-field devices.
It is an object of the present invention to provide a high-frequency switching device that is high-speed, has low insertion loss, and has high reliability.

[Summary of the invention]

In this invention, an input signal is divided into M parts by a first circuit so as to have a specific amplitude and phase, and a correlation is established between the M divided signals and the transmission coefficient of the second circuit. 2
By concentrating the distributed signal on the output of the circuit,
The input signal of the first circuit is obtained from the output of the second circuit. Then, the switching state M (connection state) between the first circuit terminal and the second circuit terminal is determined by switching the phase amount of a phase shifter inserted between the first circuit and the second circuit. This is a high frequency switching device.

〔Effect of the invention〕

The present invention can produce the following effects.

Since a low-loss passive circuit can be used as the zero component, insertion loss can be reduced.

Since there is no mechanical part and only the phase shifter is changed in order to change the switching state, an extremely high-speed switching device can be realized.

0 The operation of the present invention is a correlation operation between the first circuit output and the transmission coefficient of the second circuit through a phase shifter, so that even if a part of the circuit element fails, a malfunction will immediately occur. I won't force you. Therefore, it has sufficient reliability without using an extra spare circuit.

After the zero human power signal is once distributed into M, it passes through a phase shifter.

Therefore, the withstand voltage of the phase shifter is small, and the entire device can be realized and provided in a compact and lightweight manner.

0 device can be constructed from a planar circuit. For this reason,
It is small and lightweight and can be carried by one person.

[Embodiments of the invention]

An embodiment of the present invention will be described in detail using FIG. In the figure, 41 to 43 are phase-loaded distributors, and 51 to 53 are mixers, which constitute a first circuit.

54 to 56 and 44 to 46 are mixers and phase-loaded distributors, respectively, of the first circuit, and a second circuit that reversely filters the output. , il input In(n-1,2,3) of 5k(
k-1, 2, 3) and the output is aik. The amount of phase shift of the variable phase shifters 61 to 63 is ej? s, ejψz, ej9'
Let it be s. Then, the output bm of the terminal 2m of the second circuit becomes. Here a. k is a. represents the complex conjugate of k.

It's now. This becomes p-Op Lecture II)-2. This can be done by changing T)hio, 1.2.
This shows that the terminal 2m where the input is output changes. That is, this makes it possible to switch high frequencies. The above relationship 0) is easier to understand from Table 1.

That is, as p changes, the connection relationship between people and outputs changes periodically.

Table 1 As described above, in the present invention, the high frequency can be switched by changing the phase amount of the phase shifter inserted between the first circuit and the second circuit. It is possible to provide a high-frequency switching device that is high-speed and has various other efficiencies.

Various embodiments of the present invention can be constructed by changing the configuration of the first circuit (similarly, the second circuit).

FIG. 2 shows an embodiment using a so-called plus matrix circuit as the first circuit. In the figure, 71 to 712 are directional couplers including phase shifters.

According to this embodiment, the configuration of the first circuit can be simplified.

FIG. 3 shows another embodiment of the invention. In this embodiment, the first circuit is a so-called butlerma) I
Using a Jx, the first . Second. . . . It is effective when the phase amount of the Mth output end satisfies , and the configuration can be made simpler.

Although the embodiments of the present invention have been described with reference to microwaves and the like as high-frequency signals, it is also possible to implement the light switching device according to the same principle as the present invention even in a higher light range.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the invention, FIG. 2 shows another embodiment of the invention using a plus matrix, and FIG. 3 shows another embodiment of the invention using a Patler matrix. FIG. 4, which is a diagram showing an example, is a conceptual diagram of a Mado IJ type high frequency switching device. 1.11,12,13.14...Input terminal% 2゜2
1.22, 23, 24... Output terminal, 3... Switching element, 41.42, 43, 44, 45, 46...
・Distributor with phase load% 51, 52, 53, 54゜55
．． 56...mixer, 61,62,63,64...phase shifter, 71-712...directional coupler including phase shifter, 81-88...including phase shifter hybrid coupler. Representative Patent Attorney Noriyuki Chika (and 1 other person) 2nd
Figure 3

Claims (3)

[Claims] (1) A first circuit each having a plurality of N inputs and M outputs, and a circuit in which the input and output of the first circuit are reversed and connected to the output of the first circuit via M phase shifters. and a second circuit that changes the phase shift amount of the phase shifter.
A high frequency switching device characterized by selectively switching between an input terminal of a circuit and an output terminal of a second circuit. (2) The high frequency circuit according to claim 1, wherein the first circuit is configured to distribute the input from one input terminal to M output terminals with equal amplitude and constant phase slope. switching device. (3) With respect to the input of the k-th input terminal of the first circuit, the phase amount having a constant phase slope of the first, second, ..., M-th output terminals is φkm = (2π/M ) km, m=1, 2,..., M (1
) The high frequency switching device according to claim 2, characterized in that: