SU449314A1 - Phase meter complex signals - Google Patents

Description

The invention relates to the field of radio metering technology and can be used to create devices for measuring phase shifts between high frequency components of radio signals. The known phase meters of complex signals, containing phase detectors and a phase indicator, do not measure between the high-frequency filling of short radio pulses in a single-pulse mode. The circuit of the invention is the measurement of the phase difference between the high-frequency filling of short radio pulses and in a single-pulse mode. This is achieved by the fact that the phase meter is equipped with two phase-shifting lines, two summers, a subtraction arrangement, an integrating cascade, a differential cascade, two resonant amplifiers, and a radio pulse detector. The drawing shows the block diagram of the phase meter. It contains phase detectors 1 and 2, phase-shifting lines of length L / 8 3 and 4, summing devices 5 and 6, subtraction device 7, integrating cascade 8, differentiating cascade 9, resonant amplifiers Yu and 11, radio pulse detector 12 and phase indicator 13. Phase meter works as follows. The input signals arrive at the inputs of phase detectors 1 and 2 through phase-shifting lines 3 and 4 with a phase shift of 45 °. The signals to the second inputs of the phase detectors are fed without a phase shift. Phase detectors perform quadratic detection of input signals. At their outputs, video pulses are obtained with different amplitudes, which are summed in device 5 and subtracted in device 7. The total video impulse stress is integrated by integrator 8, and the differential video impulse voltage is differentiated by means of cascade 9. The integrated and differentiated voltage is applied by the sum of the total impulse voltage of the differential impulse. The device 6 acts on a resonant amplifier 10 tuned to a frequency much smaller than the video carrier frequency.

pulse. o -; - With an appropriate choice of constant time at the output of the amplifier, an exponential damping voltage is obtained. This voltage is applied to one of the inputs of the low-frequency phase of the IJA-13 pair. The phase indicator can be a low-frequency phase meter that measures the phase difference over a low-frequency signal period. The reference signal for phase indicator 13 is generated by detecting one of the input voltages with the help of detector 12.

The voltage from the output of the detector 12 is fed to a resonant amplifier 11, whose circuit is tuned to the same frequency as the amplifier Y circuit. The voltage from the output of the amplifier 11 is fed to the second input of the phase indicator 13. The phase difference between the voltages applied to the phase indicator 13 , is equal to the phase difference between the high-frequency filling of the porous radio pulses. Thus, the measurement of the phase difference inside the pulse is transferred to the measurement of the phase difference between the pulses.,

The operation of the device is possible in the modes when both input signals are radio pulse single or periodically repeated with a period longer than the period of the oscillating circuits of the resonant amplifiers, when one of the input signals

1/2

5l. 2

radio pulse single or periodically repeated, and a continuous periodic signal equal to the high-frequency filling of the first

signal.

Subject invention

A phase meter of complex signals containing a phase indicator and two phase detectors connected to the instrument's inputs, which is characterized by the fact that, in order to measure the phase difference between the high-frequency filling of short radio pulses and the ability to work in a single-pulse mode, it is equipped with two summing and subtracting devices ( integrating and differentiating cascades, two resonant amplifiers, a detector of radio pulses and two phase-shifting lines connected between the inputs of the device, and phase detectors, the output of one of which through the summing device and the integrating cascade, and the other - through the subtractive device and differential cascade connected to the inputs of the second summing device, the output of which through a resonant amplifier is connected to one of the phase indicator inputs, another input through the second resonant amplifier and the detector of radio pulses connected kq to the device .

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