RU1840863C - Radar transponder beacon with built-in controller - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to active radar. Transponder beacon has series-connected receiving antenna, input unit with a detector, video amplifier, decoder, paralysation unit, encoder, transmitter with a display circuit, transmitting antenna, wherein the output of the transmitter is connected to the input of the input unit with a detector through a matching unit, and the second output of the paralysation unit is connected through a trigger pulse generating unit and a switching unit to the second input of the encoder, the third input of which is connected through the switching unit to a single pulse generator; the output of the encoder is also connected to the second input of the video amplifier, wherein the output of the input unit with a detector is connected through a delay line and the switching unit to the third input of the video amplifier.

EFFECT: improved parameter control quality.

1 dwg

Description

The proposed device relates to the field of active radar and can be used as a small radar beacon transponder.

It is known that to ensure the operability of radar beacons-responders, a calibrated stimulating signal supplied to the input of the receiver is generated by a special microwave generator, portable or built into the beacon. The disadvantage of such control systems is the need for a special stimulating generator having a strictly normalized output power level, the presence of which increases the weight and dimensions of the beacon.

In the navigation automatic radar beacon-transponder described in copyright certificate No. 153494, G01S 01/60, in the "control" mode, a part of the power emitted by the transmitter of the beacon is used as a stimulating signal. The magnitude of the connection is selected so that a signal arriving at the receiver is sufficient for the beacon to operate reliably.

The defendant beacon with the described auto-control system and considered by us as a prototype has the following disadvantages:

1. Even with very good shielding between the transmitting and receiving devices, when the beacon is switched to the monitoring mode, the signal enters the receiver not only through a communication line using a branch of the transmitter power, but also in the form of a “tip” that enters any stage of the input device and leads to the launch of the lighthouse.

2. The applied control device cannot be fundamentally implemented in beacons with an encoded request with different request and response codes.

The aim of the present invention is to increase the accuracy of control of responder beacons with coded request and response with the same and different request and response codes, to reduce the weight and dimensions of radar beacon responders with an integrated monitoring device.

This is achieved by the fact that 1) a start pulse shaper, which is a differentiating chain, and 2) a delay line, which can simultaneously serve as a code shaper in control mode, are introduced into the transponder beacon circuit.

The summary of the invention is illustrated in FIG. 1, which gives a block diagram of a small-sized radar beacon-transponder with an integrated monitoring device, which contains:

6 - input device with a detector;

4 - video amplifier;

5 - delay line;

7 - decoder;

8 - block paralysis;

9 - driver pulse triggering;

1 - encoder;

10 - transmitter;

11 - matching device;

3 - single pulse generator;

2 - switching device;

12 is an indication device.

Detailed description of the device

In the control mode, the input of encoder 1 through the switching device 2 is connected to a single pulse generator 3. Through the switching device 2, the input of the video amplifier 4 is connected to the delay line 5, the video amplifier is connected to the output of the encoder, and also to the input device 6, and the output of the video amplifier is connected to the decoder 7 .

The paralysis unit 8 is connected to the input of encoder 1, and also through a switching device to a pulse shaper of start 9. The pulse shaper of start by means of encoder 1 is connected to the input of transmitter 10. The output of the transmitter through matching device 11 is connected to the input device and to indicating device 12.

Device operation

In the control mode, a pulse is transmitted from the unit pulse generator to the encoder input, and a code is generated in the encoder, which from the transmitter output through the matching device goes to the input device.

The matching device by linear or non-linear transformations by known methods generates a signal that ensures reliable start of the input device. A signal proportional to the output power of the transmitter from the input device enters the delay line. In the delay line, the signal is delayed for a time, which ensures the end of transients affecting the gain of the video amplifier, which are caused by the generation of a powerful pulse signal by the transmitter.

From the output of the line, the delayed signal is fed to the video amplifier, then to the decoder. The pulses from the output of the decoder are fed to the paralysis unit, which transmits pulses with a repetition period not exceeding a predetermined value selected based on the permissible maximum power dissipated on the anodes of the transmitter output lamps.

Then the pulse enters the encoder and the process is repeated with the only difference that in this case, the signal following a few tens of microseconds after the previous one cannot pass through the paralysis unit. The pulse received at the input of the encoder is generated by the driver of the start pulses by the trailing edge of the paralysis pulse. After that, the process is repeated.

In addition, a connection has been introduced connecting the encoder and the video amplifier and locking the video amplifier for the time the transmitter generates a response signal, thereby eliminating the excitation of the video amplifier.

Monitoring the health of the product is carried out by the glow of the bulb in the display device 12, which is triggered when the transmitter generates a response code. The flash rate of the bulb or the brightness of its glow can serve as a sign that determines the frequency of paralysis.

Thus, in the described transponder beacon with a built-in control device, the lamp glow indicates that the following parameters are within the norms:

- sensitivity of the input device;

- gain of the video amplifier;

- selectivity of the decoder;

- period of locking the paralysis unit;

- health of the encoder;

- pulsed power generated by the transmitter.

Claims (1)

A radar beacon transponder with built-in control, comprising in series: a receiving antenna, an input unit with a detector, a video amplifier, a decoder, a paralysis unit, an encoder, a transmitter with an indication circuit, a transmitting antenna; moreover, the output of the transmitter is connected to the input of the input unit with the detector through the matching unit, and the second output of the paralysis unit through the start pulse generation unit and the switching unit is connected to the second input of the encoder, to the third input of which a single pulse generator is also connected through the switch unit, in addition, the output the encoder is connected to the second input of the video amplifier, characterized in that, in order to improve the quality of parameter control, the output of the input unit with the detector through the delay line and the switching unit soy dinen with the third input of the video amplifier.

Images