SU1107068A1 - Device for measuring phase shift of four-terminal networks - Google Patents

Abstract

DEVICE FOR MEASURING THE PHASE SHIFT CHETGREHPOLYUSNIKOV comprising a microwave generator, whose output is connected to the input nlochom power splitter and to the first output port connected in series with single-pole modulator, mixer, bandpass filter, and sinhronnofazovy detector and submodule torus, whose output is connected to the control single-band modulator input, while the second output arm of the power divider and the second mixer input are the inputs for connecting the tested quadrupole, differing That is, in order to improve the measurement accuracy and enable measurement of the attenuation coefficient, a parallel filter is connected to the output of the cvjHxpoHHo-phase detector. A low-pass filter and a band-pass filter are connected between the output of the submodulator and the reference input of the synchronous-phase detector Phase-shifting and phase-shifting manipulator, the control input of which is connected to the output of the submodule via the entered frequency divider. c) oo

Description

11 The invention relates to a measurement technique and can be used in amplampazometer circuits. A device for measuring the phase shift, consisting of a microwave generator, a square pulse generator, a mixer, consisting of an adder and a quadratic detector, an amplitude modulator, an exemplary phase shifter, a bandpass filter, and a synchronous detector l, is known. However, this device can unambiguously measure the phase only in the range of 180 °. The closest technical solution to the invention is a device for measuring the phase shift of quadrupoles, containing a microwave generator, the output of which is connected to the input shoulder of a power divider, and a single sideband modulator, mixer, band-pass filter and synchronous signal are connected in series to the first output shoulder. a phase detector as well as a submodulator, the output of which is connected to the control input of the single-sided modulator, while the second output arm of the power divider and the second input of the mixer are inputs for Connections of the studied quadrupole 2. The known device for measuring the phase shift of quadrupoles does not provide high accuracy of measurements and does not allow measuring the attenuation coefficient. The purpose of the invention is to improve the measurement accuracy of measuring the attenuation coefficient. To achieve the goal in a device for measuring the phase shift of quadrupoles containing a microwave generator whose output is connected to the input shoulder of a power divider, and a single-band modulator, a mixer, a band-pass filter and a synchronous-phase detector, as well as a submodulator, are connected in series to the first output arm the output of which is connected to the control input of the single-sided modulator, wherein the second output arm of the power divider and the second input of the mixer are the inputs for connecting the tested quadrupole, A low-pass filter and a band-pass filter are connected in parallel to the output of the synchronous-phase detector, and between the submodulator code and the synchronous-phase 8-GO detector reference input, a compensation phase shifter and a phase manipulator are connected in series, the control input of which is connected to the submodulator output frequencies. The drawing shows a structural electrical circuit of the proposed device. A device for measuring the phase shift of quadrupoles includes a microwave generator 1, a quadrupole 2, a mixer 3, a single-sided modulator A, a submodulator 5, a band-pass filter 6, a synchronous-phase detector 7, a compensation phase-shifter 8, a phase manipulator 9, a divider 10 frequencies, band-pass filter 11, a low pass filter 12 and a power divider 13. The device works as follows. The microwave generator 1 generates a continuous signal, which through the quadrupole 2 under study arrives at the first input of the mixer 3, to the second input of the mixer 3 the signal from the microwave generator 1 is passed through a single-pole modulator 4 controlled by a submodulator 5. From the output of the mixer 3 the signal is fed to a bandpass filter 6, at the output of which the frequency signal of submodulator 5 is extracted, which is fed to the first input of the synchronous-phase detector 7. The second input of the synchronous-phase detector 7 receives a reference phase-shifted signal from the submodulator 5 through the compensation phase shifter 8, phase manipulation () is performed with the submodulator frequency reduced by a factor of two or more in the phase manipulator 9, controlled by the submodule 5 signal passed through frequency divider 10. As a result, a sequence of constant levels proportional to cos () and appears at the output of synchronous-phase detector 7 with a frequency of manipulation, where f is the phase shift of the compensation phase shifter 8, and Chu is the phase shift caused by the quadripole under study 2. The amplitude of this signal, proportional to the attenuation coefficient of the quadrupole 2, is provided with a band-pass filter 11, and

3. 11070684

setting phase-shifting compensation in series between

tel 8 - so that it is variable with the co-output of the submodule of the torus and the reference

the signal on the sync input of the synchronous phase detector-phase detector 7 is equal to the compensation phase shifter

zero, which is registered in the circuit j and the phase manipulator, by controlling the submodulator's yoke of the low-frequency filter 12 through the divider clock to determine the phase shift of four meters, allows to increase the accuracy

polarization + 5 °. phase measurements, as errors Introduction to the filter circuit of the lower young phase detector is equal to the frequency and band-pass filter, parallel-to measure the factor connected to the output of the sync damping of the four-pole circuit. phase detector, as well as izhenikov.

levels in the output signal synchronous

Claims (1)

DEVICE FOR MEASURING A PHASE SHIFT OF FOUR-POLE VOLUMES, containing a microwave generator, the output of which is connected to the input arm of the power divider, and a single-pole modulator, a mixer, a bandpass filter and a synchronous phase detector, as well as a submodulator, the output of which is connected to the first output arm the input of a single-band modulator, while the second output arm of the power divider and the second input of the mixer are inputs for connecting the studied four-terminal network, characterized in that, In order to increase the accuracy of measurements and provide the possibility of measuring the attenuation coefficient, a low-pass filter and a band-pass filter are connected in parallel to the output of the synchronous-phase detector, and a compensation phase phase shifter and phase manipulator, control input, are connected in series between the output of the submodulator and the reference <g input of the synchronous-phase detector which is connected to the output of the half-modulator through the introduced frequency divider.