JPH0498181A - Transmitter/receiver module - Google Patents

Abstract

PURPOSE:To prevent external output of an abnormal signal by providing a switch at an in/out terminal of a receiving amplifier in each receiver module. CONSTITUTION:When a receiving amplifier 10 is put to operate, it is put in no signal condition on the input side because it is connected with a no-reflection terminator 12, while an amplified signal of a noise level corresponding to action characteristics of the receiving amplifier is outputted on the output side. In case the receiving amplifier gets failure and generates abnormal vibration outside its zone, an abnormality determination signal S at a wave detector 15 is received to hole a switch 13 between terminals (a)-(c) for preventing the abnormal signal from getting outside.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmitting/receiving module, and relates to a method for detecting an abnormality in its operation.

[Conventional technology]

Figure 2 shows an example of the high frequency section of a radar device using a transmitting/receiving module, and Figure 3 shows an example of the high frequency section of the transmitting/receiving module.
As shown in the figure.

In Fig. 2, 1 is a transmitting exciter, 2 is a transmitting/receiving switch,
Reference numeral 3 designates a transmitting signal distributor/receiving signal combiner (hereinafter referred to as a distributor/combiner), 4 a transmitting/receiving module, 4a an antenna element, and 5 a receiver.

In Fig. 3, 6 is a phase shifter, 7.9 is a transmission/reception switch, and 8
1 is a transmitting amplifier, and 10 is a receiving amplifier.

Next, the operation will be explained.

At the time of transmission, the transmission signal Pt generated by the transmission exciter 1 passes through terminals a to b of the transmission/reception switch 2 to the distributor/synthesizer 3.
The signal Pt is distributed to an arbitrary number n and is supplied to the transmitter/receiver module 4 as a signal Pt''.

As shown in FIG. 3, the transmission signal Pt° input to the transmission/reception module 4 passes through a phase shifter 6, passes through terminals a = b of a transmission/reception switch 7, and is then changed to a predetermined level P by a transmission amplifier 8.
The signal is amplified by T and is radiated to the outside by the antenna element 4a via terminals a and b of the transmitter/receiver switch 9.

In addition, during reception, the signal Pr received by the antenna element 4a passes through terminals b to C of the transmitter/receiver switch 9 and is sent to the receiver amplifier 1.
0 and is amplified with a predetermined gain to become a signal Pr', which passes through terminals C to a of the transmitter/receiver switch 7 and the phase shifter 6, is combined in the distributor/synthesizer 3, and becomes PR, which passes through terminals b to c of the transmitter/receiver switcher 2. It enters the receiver 5 and processes the received signal.

Here, the phase shifter 6 in the transmitter/receiver module 4 operates to obtain a desired amount of phase shift based on phase setting information sent in advance from the outside.

Further, the transmitting amplifier 8 and the receiving amplifier 10 each operate only during the corresponding time.

[Problem to be solved by the invention]

Since the conventional transmitting/receiving module is configured as described above, if an abnormality occurs in the receiving system of the transmitting/receiving module, it is necessary to stop the normal operation of the laser device and identify the failure location in an offline state. Furthermore, since this requires each transmitter/receiver module to operate independently, the time required for detecting an abnormality is proportional to the number of transmitter/receiver modules, resulting in a problem such as a huge amount of time being required.

In particular, if there is a transmitting/receiving module in which abnormal oscillations occur in the receiving system, the adverse effect on the radar system is significant, resulting in system stoppage.

The present invention has been made to solve the above-mentioned problems, and it is possible to identify abnormal oscillations in the receiving system of the transmitting/receiving module without stopping the operation of the radar system (while keeping the radar system always online). However, it is an object of the present invention to provide a transmitting/receiving module that can perform processing to prevent system interruptions due to abnormal oscillation.

[Means to solve the problem]

The transmitting/receiving module according to the present invention is provided with a switch at the input/output end of the receiving amplifier in each receiving module, and a detection circuit for detecting abnormal oscillation of the receiving amplifier is added to the switch provided at the output end. In addition, it is configured to prevent abnormal signals from being output to the outside.

[Operation] In this invention, a switch is provided at the input/output end of the receiving amplifier in each transmitting/receiving module, and a circuit for detecting abnormal oscillation of the receiving amplifier is added to the switch provided at the output end, so that abnormal signals are detected. Since it is configured to prevent external output, there is no need to go offline for inspection, and there is no need to operate each transmitter/receiver module independently, saving time and preventing abnormal oscillation. System failure can also be prevented.

〔Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a method for detecting abnormal oscillation in a receiving system of a transmitting/receiving module according to an embodiment of the present invention.

In the figure, the same reference numerals as in FIG. 3 indicate the same parts.

11 and 13 are switches, 12 is a non-reflection terminator, 14 is a band rejection filter, and 15 is a detection circuit.

Next, a method for detecting abnormal oscillation will be explained.

During transmission, a switch 11 provided at the input end of the receiving amplifier 10 connects the terminals a and c to the non-reflection terminator 1.
Connected to 2. Further, a switch 13 provided at the output end of the receiving amplifier 10 makes the terminals 3 to 0 conductive.

At this time, when the receiving amplifier 10 is put into operation, the input side is connected to the non-reflection terminator 12, so there is no signal, but the output side has a noise level corresponding to the operating characteristics of the receiving amplifier 10. An amplified signal is output.

Here, if the receiving amplifier malfunctions and abnormally oscillates outside the band, the signal passes through the band removal filter 14 and is compared with a reference value in the detection circuit 15 to determine whether it is normal or abnormal.

Also, during reception, the terminals b' and a of the switch 11 are made conductive, the terminals 8 to 5 of the switch 13 are made conductive, and the receiving amplifier 10 is operated, but when the above abnormality occurs, the detector 15 In response to the abnormality determination signal S, switch 1 is activated.
3 is held between terminals a and c to prevent an abnormal signal from going outside.

As described above, according to this embodiment, a switch is provided at the input/output end of the receiving amplifier of each transmitting/receiving module, and a band rejection filter and a detection circuit are further provided at the switch on the output end side, and the above switch is used during transmission. By disconnecting the receiving amplifier from the transmitting side, abnormal oscillations can be detected in each transmitting/receiving module, so the laser device can detect abnormal oscillations in the transmitting/receiving module itself all at once while remaining online. Since the output is not output to the outside, there is no need to take the radar device off-line to inspect the transmitter/receiver module, and it is also possible to prevent the radar device from stopping operation due to abnormal oscillation.

[Effects of the Invention] As described above, in the transmitting/receiving module according to the present invention, a switch is provided at the input/output terminal of the receiving amplifier in each transmitting/receiving module, and the switch at the output terminal is configured to prevent abnormal oscillation of the receiving amplifier. A detection circuit is added, and the above switch is configured to prevent abnormal signals from being output to the outside, so there is no need to go offline for inspection, and each transceiver module can operate independently. This is not necessary, and furthermore, it has the effect of preventing system interruption due to abnormal oscillation.

Furthermore, since the transmitting amplifier and the receiving amplifier are opened by a switch, unnecessary closed-loop oscillation can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining an operation abnormality detection method of a transmitting/receiving module according to an embodiment of the present invention, FIG. 2 is a diagram for showing the concept of a high frequency section of an active phased array radar device, and FIG. 3 is a diagram for explaining a conventional method. FIG. 2 is a diagram illustrating a high frequency section of a transmitting/receiving module of FIG. In the figure, 1 is a transmitting exciter, 2, 7.9 are transmitting/receiving switchers, 3 is a transmitting signal distribution/receiving signal combiner, 4 is a transmitting/receiving module and an antenna element, 5 is a receiver, 6 is a phase shifter, 8 is a transmitting amplifier, 10 is a receiving amplifier, 11.13 is a switch, 12 is a non-reflection terminator, 14 is a band rejection filter,
15 is a detection circuit. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] (1) In the transmitting/receiving module that constitutes the antenna section of the active phased array radar, a switch is provided at the input/output end of the receiving amplifier in the receiving module, and a means for detecting abnormal oscillation is provided in the switch on the output end side. A transmitting/receiving module characterized by: