SU1223166A1 - Microwave amplitude phasemeter - Google Patents

Abstract

The invention may use -c to measure the phase difference and coefficient. attenuation of two coherent signals, as well as to measure the delay time in the microwave range. The functionality is extended by measuring the delay time. The signal of the microwave generator 1, modulated in frequency using a generator 2 of modulating current (G), is fed to the studied quadrupole (ICP) 3 and through a continuously tunable phase shifter 5 to the adder 7. To another input of the adder 7, a signal is received from the ICP 3 passed through phase manipulator (FM) 0-180 4 and FM 0-90 & 6. From the adder 7, the signal through the quadratic detector 8 and the aperiodic amplifier 9 enters the switches 12 and 13 and further through the corresponding amplifiers 15 and 16 of the intermediate frequency, synchronous detectors 17 and 18, and low-pass filters 19 and 20 to the indicators 21 and 22 constant current. When measuring the delay time, the ICP 3 is first disconnected, the supply paths are connected to each other and, with the G 2 disconnected, using a continuously tunable phase shifter 5, the maximum value is set on the indicator 22, and the minimum value on the indicator 21. Then, when the frequency change is turned on for G 2, the same indications are obtained on indicators 21 and 22. At the same time, the delay time due to the supply paths is 1 / T. The ICP 3 is then connected and the delay time with the supply paths is also measured. The delay time of an IPP 3 is defined as o, 1 sludge. (S 5 (L to y

Description

The invention relates to a measurement technique and can be used to measure the phase difference and attenuation coefficient of two coherent signals, as well as to measure the delay time in the microwave range. The purpose of the invention is to extend the functionality by measuring the delay time.

The drawing shows a structural electrical circuit of the proposed microwave amplification meter.

The microwave amplifier consists of a microwave generator 1, modulated in frequency using a modulating current generator 2, a four-pole 3 researched, a phase manipulator 0-180 4, a continuously tunable phase shifter 5, a phase manipulator, an adder 7, a quadratic detector 8, aperiodic amplifier 9, submodulator 10, frequency divider 11, switches 12 and 13, inverter 14, first 15 and second 16 intermediate frequency amplifiers, first 17 and second 18 synchronous detectors, low pass filters 19 and 20, first 21 and second 22 indicators DC.

The device works as follows.

The studied four-pole network 3 is undocked, the supply paths are interconnected. When the generator 2 is turned off, the maximum value is continuously adjusted by the phase shifter 5 on the second indicator 22, and the minimum value on the first indicator 21. Generator 2 is turned on. By varying its frequency, voltages are produced at the outputs of the first 1.5 and 16 second amplifiers of the intermediate frequency. By fine tuning the generator 2, it is achieved that the quadrupole 3 under investigation is then connected, and the indicated method. The bomber measures the delay time of a 4-pole 3 with supply paths c,.

5 From here, s, -Gd, where t is the delay time of the investigated quadrupole 3. The electrical length of the tested quadrupole 3 is related to the delay time by the ratio:

10 where t is the delay time; f. - the frequency of the microwave generator 1, corresponding to the operating frequency of the quadrupole 3.

15

20

25

To measure very small delays in series with the two-port 3 under study, a cabling delay line is connected, for example, f 1 ISS. This is necessary so that the frequency of oscillator 2 does not exceed 1 MHz, i.e. was acceptable for frequency modulation of microwave generator 1.

Claims (3)

Invention Formula A microwave amplifiers containing a microwave generator, the output of which is an output for connecting the input of the studied quadrupole, serially connected phase manipulator 0-180, the input of which is the input for connecting the output of the investigated quadrupole, phase manipulator 0-90, adder and quad - a rati detector, a submodulator, a phase manipulator input of 0-180 ° and a frequency divider with a control input of a phase manipulator of 0-90, characterized in that, in order to extend the functionality by measuring delay time, to the output of the quadratic detector, in series. connected aperiodic amplifier, first switch, first intermediate amplifier30 40 readings of the corresponding indications of 45 "d frequencies, the first synchronous detectors 21 and 22. The delay time, the trap, the first low-pass filter and the first DC indicator, the second switch, the second intermediate frequency amplifier, the second synchronous detector, the second low-pass filter and the second DC indicator are serially connected to the output of the aperiodic amplifier. fishing tracts, f equals -, where., - is frequency of t pa 2. Since sootvetstvundndie show-, 50 pickups of the diggers 21 and 22 can be up to shifts at frequencies that are multiple to f (2f d, 3f (j, ....), then the frequency of generation-: - about 0 torus 2 should be changed towards Increase. The first frequency at which the corresponding indications appear on the indicators 21 and 22 is true. 55 between the output of the microwave generator and the second input of the adder, a smoothly tunable phase shifter is turned on, the output of the frequency divider is connected to the control input of the first switch via Then, the quadrupole 3 under study is connected, and the indicated method is. The bomber measures the delay time of a 4-pole 3 with supply paths c,. Hence, s, -Gd, where t is the delay time of the investigated quadrupole 3. The electrical length of the quadrupole 3 under study is related to the delay time by the ratio: where t is the delay time; f. - the frequency of the microwave generator 1, corresponding to the operating frequency of the quadrupole 3. To measure very small delays, a calibrated delay line is connected in series with the studied 3-port 3, for example, f 1 MKS. This is necessary so that the frequency of oscillator 2 does not exceed 1 MHz, i.e. was acceptable for frequency modulation of microwave generator 1. Invention Formula A microwave amplifiers containing a microwave generator, the output of which is an output for connecting the input of the studied quadrupole, serially connected phase manipulator 0-180, the input of which is the input for connecting the output of the investigated quadrupole, phase manipulator 0-90, adder and quad - ratifier detector, submodule, you 0-180 ° phase manipulator input and a frequency divider with a phase manipulator 0-90 control input, characterized in that, in order to extend the functionality by measuring the delay time, the aperiodic amplifier, the first, is connected to the output of the quadratic detector. switch, first intermediate amplifier „D frequencies, first synchronous detector, first low-pass filter and between the output of the microwave generator and the second input of the adder, a smoothly tunable phase shifter is turned on, the output of the frequency divider is connected to the control input of the first switch via 312231664. the entered inverter and with the control inputs of the first and second synchronous inputs of the second switch, and the output of the detectors, while the microwave generator of the submodulator is connected to the reference frequency modulated.