JPS601919A - Microwave switch matrix - Google Patents

Abstract

PURPOSE:To constitute a small-sized and light-weight switch matrix with high reliability by providing a large quantity of switch parts and driving switches individually, and selecting and controlling switches used for switching with a control signal. CONSTITUTION:At a normal time, switches 9-1 and 9-2 are used for switching. In this case, switches 9-1 and 9-2 are driven in accordance with control signals to terminals 11-1 and 11-2 by driving circuits 10-1 and 10-2. At this time, control signals are always inputted to terminals 11-3 and 11-4. If antrouble occurs in one of switches 9-1, 9-2, 10-1, and 10-2, control signals which turn off switches 10-1 and 10-2 are inputted to control signal terminals 11-1 and 1-2, and switches 9-3 and 9-4 and driving circuits 10-3 and 10-4 are used for signal switching. Thus, troubles are recovered unless switches 9-1 and 9-2 are faulty in the turn-on state together.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a highly reliable switch matrix device that is small and lightweight and switches and connects microwave signals at high speed.

(Background Art) FIG. 1 shows the basic configuration of a 4x4 microwave switch matrix (MSM) in which the number of input terminals is 4 and the number of output terminals is 4. l-1 to 1-4 are input terminals, 2-1 to 2-
4 is an output terminal and is a switch section of Mu to M44.

Connection between the input and output terminals is performed by controlling the switch sections M+1 to M4. To make MSM highly reliable, a redundant configuration has conventionally been adopted.

Figure 2 shows a preliminary configuration with 100% redundancy, with 3- to 8 output terminals of 4 x 8 MSM.
The spare switching switches 1 to 3-4 are provided to switch the row switches 4-1 to 4-8 depending on the failure state of the switching section. In the configuration shown in Figure 2, two sets of column switches are connected to each output terminal, and one of the column switches
If one switch fails, the remaining set of row switches will switch over. Furthermore, if a failure occurs in this column switch, the MSM will fail. Furthermore, if a failure occurs in the standby switching switch, the MSM will also fail. As described above, in the conventional redundant configuration, it is difficult to achieve high reliability due to the use of a standby switch and restrictions on the connections of the redundant configuration, and there are also restrictions on miniaturization and weight reduction.

(Problems to be solved by the invention) In order to eliminate these drawbacks, the present invention has multiplexed switch sections to achieve higher reliability, smaller size, and lighter weight. In a microwave switch matrix that is switched and connected to a microwave switch matrix, there is a means for dividing the input line of the switch section at each intersection of the matrix into a plurality of parts, and a plurality of switches in series that can be connected to each dividing line and can be individually controlled on/off. The connected switch module and
means for composing the outputs of the respective series-connected switch modules and coupling them to the output line of the switch section, wherein a plurality of series-connected switch modules are substantially inserted in parallel between the input line and the output line. It is in a microwave switch matrix such as the one shown in FIG.

(Structure and operation of the invention) FIG. 3 shows an embodiment of the invention, and shows the structure of a switch section. In this figure, 1 is a signal input terminal, 2 is a signal output terminal, 5 is a 4-terminal directional coupler on the input side, 6 is a 4-terminal directional coupler on the output side, 7 is a power divider on the input side, and 8 is a directional coupler on the output side. Output side power divider (with combiner function)
, 9-1 to 9-4 are switches, and 10-1 to 10-4 are drive circuits for each switch. Also 1 1-1 to 11-4
are control signal input terminals to the drive circuit, and are separately connected to 0N1.
0FF control is possible.

Next, the switching operation will be explained. In normal times, switching is performed using switches 9-1 and 9-2. In this case, depending on the control signals to 11-1 and 11-2,
By the drive circuit of 10-1 and IO-2, 9-1 and 9-
2 switches are activated. At this time, 11-3 and 1
A control signal to be used as the control signal 1-4 is constantly input.

Here, if a failure occurs in any of 9-1.9-2.10-1.10-2, connect the switches 10-1 and 10-2 to the control signal terminals of 11-1 and 11-2. Input the control signal to turn OFF and turn the switches 9-3.9-4 and 10-3. Signals are switched using the to-4 drive circuit. By doing this, the failure can be repaired, except when the failure occurs while both 9-1 and 9-2 are in the ON state.
The reliability of the switch section can be increased. Therefore, by applying the configuration of FIG. 3 to each switch section of FIG. 1, the reliability of the MSM can be increased compared to the redundant configuration of FIG. 2 in which failures are relieved for each column switch. FIG. 4 shows the survival probability after seven years for the MSM with the redundant configuration of FIG. 2 and the MSM in which the configuration of FIG. 3 is applied to the switch section of FIG. 1. Here, the failure rate of the standby changeover switch shown in FIG. 2 is taken as OFit. In this way, by configuring the switch section with multiplexed switch modules, high reliability as an MSM can be achieved. Furthermore, by integrating the multiplexed switch sections, the MSM as a whole can be made smaller and lighter than the configuration shown in FIG.

5 and 6 show another embodiment of the invention. 6th
In the figure, 12 is a six-terminal directional coupler on the input side, 13 is a six-terminal directional coupler on the output side, and other symbols are the same as in FIG. 3. Furthermore, the switching operation in both FIGS. 5 and 6 is the same as that in FIG. 3.

(Effects of the Invention) As explained above, the switch section is multiplexed, each switch is driven individually, and the switch used for switching is selected and controlled by a control signal. It has the advantage that a highly reliable microwave switch matrix can be constructed in a small and lightweight manner without requiring a .

[Brief explanation of drawings]

Figure 1 is a basic configuration diagram of a 4x4 microwave switch matrix, and Figure 2 is a diagram of the basic configuration of a 4x4 microwave switch matrix.
3 is a diagram showing the configuration of a switch section according to an embodiment of the present invention, FIG. 4 is a diagram showing an example of calculating the survival probability, and FIGS. FIG. 6 shows the configuration of a switch section according to another embodiment of the present invention. i, t-i~1-4...Signal input i element 2, 2-1~
2-4... Signal output terminal Mu to M44... Switch section 3-1 to 3-4... Preliminary switching switch 4-1 to 4
-8...Column switch 5...Input side 4-terminal directional coupler 6...Output side 4-terminal directional coupler 7...Input side power divider 8...Output side power divider 9 -1 to 9-4...Switch 10-1-10-4...Drive circuit 11-1 to 11-4...Control signal input terminal 12...
Input side 6-terminal directional coupler 13... Output side 6-terminal directional coupler Patent applicant Nippon Telegraph and Telephone Public Corporation Patent application agent Megumi Yamaki - Figure 1 Figure 2 - Figure 4 1 , [Zui So + 7 Joule failure rate (Ftt) Figure 6

Claims (1)

[Claims] In a microwave switch matrix that mutually switches and connects a plurality of input and output terminals, means for dividing the input line of the switch section at each intersection of the matrix into a plurality of parts, and individual on/off control connected to each dividing line. a switch module in which a plurality of switches capable of A microwave switch matrix characterized in that a plurality of sets are substantially inserted in parallel between a line and an output line.