SU1509755A1 - Device for monitoring antenna-feeder circuit - Google Patents

Abstract

This invention relates to a radio measuring technique. The purpose of the invention is to increase the reliability of the control under conditions of concentrated noise. To achieve the goal, a device containing a test signal generator 1, a controlled antenna-feeder path 3, an antenna 4, a directional coupler 5, an amplifier 9, a threshold unit 10 and a clock generator 11, a frequency converter 2, a receiving unit 6 and two integrators 7 and 8. Receiving unit 6 monitors the frequency of the test signal and selects, and integrators 7 and 8 integrate the signal during its duration. The concentrated interference is integrated over a period of time as long as its frequency coincides with the frequency of the test signal, which is significantly less than the integration time. Due to this, even the most powerful concentrated interference does not affect the result of the integration and thereby increases the reliability of the control. 1 il.

Description

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The invention relates to a radio measuring technique and can be used to monitor the health of the antenna-feeder path,

The purpose of the invention is to increase the reliability of monitoring under conditions of concentrated noise. The drawing shows a structural electrical circuit of the device for monitoring the antenna-feeder path.

The device for controlling the antenna-feeder path contains a test signal generator 1, a frequency converter 2, a controlled antenna-feeder path 3, an antenna 4, a directional coupled 5, a receiving unit 6, the first and second integrators

and 8, the amplifier 9, the threshold unit 10

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and 11 clock pulse generator.

The device for monitoring the antenna-feeder path works as follows.

The generator 11 generates three clock pulse sequences: at the first output — for controlling the generator 1, at the second output. —For gating the threshold unit 10, at the third output — for resetting the first and second integrators 7 and 8.30

Upon receipt at the input of the generator control 1 clock pulse generator. 1 generates a stable amplitude signal from a linear frequency of the test signal and varies over time equal to the duration of the clock pulse of generator 1 by several hundred kilohertz. Receiving unit 6 tracks the frequency of the test signal and performs a lecture, and the first and second integrato 7 and 8 integrates the signal during its lifetime. The concentrated interference is integrated over a period of time, as long as its frequency coincides with the frequency of the test signal, which is significantly less than the integration. Due to this, even the most powerful lumped interference does not affect the result of the integration and, thus, the accuracy of control is increased.

Claims (1)

Invention Formula A device for monitoring the antenna-feeder path, containing a test signal generator, directional modulation (chirp), which is a direct coupler connected to It goes to the controlled antenna-feeder path.3 and to the converter 2, the energy of the incident and reflected from the antenna 4 waves in the controlled antenna-feeder path 3. In the directional coupler 5, it sends signals that go to the first and second the signal inputs of the receiving unit 6. The latter converts the input. The low-frequency signals into signals of a constant frequency, 45 selects and detects them. The signal of the reflected wave through the receiving unit 6 and the first integrator 7 is fed to the first input of the amplifier 9, and the signal of the incident wave, whose amplitude Q is inversely proportional to the attenuation of the controlled antenna-feeder path 3, through the receiving unit 6 and the second integrator B to the second (control Amplifier input 9, With a 55 increase in attenuation of the controlled antenna-feeder train 3, the voltage at the second input of amplifier 9 decreases, while its coefficient laziness and the output voltage proportional to the level of the reflected wave averaged by the first integrator 7 increase. When the output voltage of the amplifier 9 exceeds the threshold value, the threshold unit 10 is triggered, and at the moment when the gating pulse appears from the generator output 11, a stop signal is received at its input from the output of the threshold unit. The frequency of the test signal changes in a time equal to the duration of the clock pulse of the generator 11 by several hundred kilohertz. Receiving unit 6 tracks the frequency of the test signal and selects, and the first and second integrators 7 and 8 integrate the signal during its operation time. The concentrated interference is integrated over time, as long as its frequency coincides with the frequency of the test signal, which is significantly less than the integration. Due to this, even the most powerful lumped interference does not affect the result of the integration and, thus, the reliability of the control increases. Invention Formula A device for monitoring the antenna-feeder path, comprising a test signal generator directed by the antenna-feeder. antenna path, amplifier and threshold unit, as distinguished from the fact that, in order to increase the reliability of control under conditions of concentrated noise, serially connected frequency converter, receiving unit and the first integrator, whose output is connected to the first input of the amplifier, the second output of the npneMiforo unit through the input of the second integratbr is connected to the second input of the amplifier, the generator output of the test b, the drive is connected to the controlled antenna-feeder path and the input of the frequency converter The control input is connected to the first output of the input clock generator, the control input of which is connected to the output of the threshold unit, the second and third outputs are connected to the second inputs of the first and second integrators, and the fourth output (ed. to the first input of the threshold 51509755 the unit, the output of the amplifier of the pivotal coupler is connected to the first input of the threshold power supply with the first and second signals, and the first and second outputs to the directional inputs of the receiving unit.