SU1141343A1 - Device for measuring uhf four-terminal network attenuation and phase shift - Google Patents

Abstract

A DEVICE FOR DIMENSION MEASUREMENT AND PHASE SHIFT OF THE MOVIE-FOUR-POLES, containing a microwave generator, the first and second phase handles connected in series, the adder, the second input of which is connected to the output of the microwave generator, and the first detector, a synchronous detector, a square pulse generator, a output of which is a microwave generator, the output of which is a microwave generator, and the modulating input of the first phase shift key and through the first frequency divider - - with the modulating input of the second phase shift key, with the output of the microwave generator and the input of the first phase wave The cameras are respectively the input and output for connecting the studied microwave four-port network, which is so that, in order to broaden the dynamic range and obtain information on the phase shift and attenuation in the form of signals proportional to quadrature components, between the output the first detector and the input of the synchronous detector are connected in series with a controlled discrete attenuator and the first intermediate frequency amplifier, between the output of the first frequency divider and the reference input of the synchronous detector after The second frequency divider and the third phase manipulator, the modulating input of which is connected to the output of the square pulse generator, are connected to the output of the inputted second intermediate frequency amplifier; the first and the second phase detectors and the second detector are connected in parallel to the output, the input of the controlled discrete attenuator, the output of the second frequency divider is connected to the reference input of the second phase detector and, through the input of the fourth phase shift manipulator with the reference input the first phase detector, and the third frequency divider is connected between the output of the second frequency divider and the modeling input of the fourth phase manipulator, while the outputs of the first and second phase detectors and the second oo detector are respectively 4 ;:. outputs of signals proportional to quadrature components, phase shift and attenuation.

Description

The invention relates to a radio metering technique and can be used to measure the damping and phase shift of a microwave quadrupole in a wide dynamic range. A device is known for measuring the phase difference of two sinusoidal signals and the ratio of their amplitudes, comprising a series-connected high-frequency unit, a frequency conversion unit, a base unit, a dial indicator f. . A disadvantage of the known device is the narrow dynamic range and the lack of information on phase shift and attenuation in the form of signals proportional to the quadrature component. The closest technical solution to the invention is a device for measuring the attenuation and phase shift of microwave quadrupoles containing a microwave generator, sequentially connected first and second phase handlers, an adder, the second input of which is connected to the output of the microwave generator, and the first detector is a synchronous detector, -generator direct Ogol pulses, the output of which is connected to the first phase-shifter modulating the house through the first frequency divider — to the modulating input of the second phase-shifter; in this case, the output of the generator's CB and the input of the first phase-shifter are respectively an input and output for connecting the studied Microwave quadrupole 2 However, the known device for measuring the attenuation of the phase shift of the microwave quadrupole has a narrow dynamic range and does not provide information about the phase shift and attenuation in the form of signals flow proportional quadrature components object of the invention - with dynamic and-receiving information of the phase shift and attenuation of a signal proportional to the quadrature components. The goal is achieved by the fact that the device for measuring the attenuation and phase shift of a microwave quadrupole circuit containing a microwave generator, serially connected first and second phase manipulators, an adder, a second whose input is connected to the output of the microwave generator, and the first detector, a synchronous detector, a generator of rectangular pulses, the output of which is connected to the modulating input of the first phase shift key and via the first frequency divider to the modulating input of the second phase shift key, while the output of the microwave generator and The first phase manipulator is an input and an output for connecting a microwave quadrupole under investigation. A controlled discrete attenuator and an intermediate frequency amplifier between the output of the first frequency divider and the reference input of the synchronous detector are sequentially connected between the output of the first detector and the input of the synchronous detector. In series, a second frequency divider and a third phase manipulator, modulating the co-o input, are connected to the output of the generator, rectangular pulses, to the output The first and second phase detectors and the second detector, the output of which is connected to the control input of the controlled discrete attenuator, are connected to the input of the second intermediate frequency amplifier; the output of the second frequency divider is connected to the reference input of the second phase detector and through the entered fourth phase manipulator the reference input of the first phase detector, and between the output of the second frequency divider and the modulating input of the fourth phase manipulator, the third frequency divider is included, while The outputs of the first and second phase detectors and the second detector are respectively outputs, signals, proportional to quadrature components, phase shift and attenuation. The drawing shows the structural electrical circuit of the device for measuring the attenuation and phase shift of microwave quadrupoles. A device for measuring the attenuation and phase shift of a microwave quadrupole circuit comprises a microwave generator 1, first and second phase manipulators 2 and 3. Adder 4, first detector 5, synchronous detector b, generator 7 — rectangular pulses, first frequency divider 8, - microwave quadrupole 9 under study, controlled discrete attenuator 10, first intermediate frequency amplifier 11, second frequency divider 12, third phase manipulator 13, second intermediate frequency amplifier 14, first and second phase detectors 15 and 16, second detector 17, - Thursday the third phase keypad 18, the third frequency divider 19, as well as the first and second valves 20 and 21, the first and second digital voltmeters 22 and 23. A device for measuring the attenuation and phase shift of a microwave quadruple circuit operates in the following way Signal at the output of the studied microwave four circuit. 9 has the form K AQSin (.W (, t + tf,), where K is a coefficient characterizing the attenuation of the investigated microwave quadripole 9; Lz is the amplitude of the signal of the microwave generator 1; —the phase shift introduced by the microwave microwave quadripole under study 9. The signal at the output of the first phase shift key 2, which, in the process of measurements with a frequency, is a 7 rectangular generator,, “. pulses (usually 100 kHz) accept discrete phase states - 0.180 ° can be written as

K, (coj, t + (p,

at

   fx -KjjA sinCo t -Hfp

where t | - the period of the pulse generator 7. The signal at the output of the second phase switch 3, which in the process of measurement takes discrete phase conditions O,

pt 1

F - t takes the form

 xAoSin (GJ (jttlfJnpM04t:

npnO "t-g- x o i otttPxl 2Tg

(LdSov (so) () at

npH-iicTj

o- KX AgCOS (.oJol + s, 1 pri- “-t

After summing in the adder 4 by the signal of the microwave generator 1 A cosUgt, the output signal of the first detector will be as follows

AotA Kji2AoKxS fiq), npnOst | -l A ok: -2A, .in4, npH |.

i2. .g ,, g

   chri

Upri

A And OK-2A xC09H chri-gSt-T,

T

; 4Aok) .co5qj: -

and l. J ZTZ

- AoXxSinCfxnpu- t - (, with- siTj

or, using a Fourier series, a signal can be written as an expression

one {

 -j (singi ,, - C05tfx CO vin, t-leinqix-tcoeqi sinn.

The signal after the second amplifier 14 intermediate frequency, set .52.

on frequency

ъ5 takes the form

AoKxCOa. (R ittcf + l-j.

Next, the signal arrives at the first and second phase detectors 15 and 16 0 and the second detector 17, from the outputs of which signals are proportional to, respectively, the quadrature components, phase shift and attenuation. A portion of the signal from the output of the second detector 17 is fed to the control input of a controllable discrete attenuator 10 for automatic gain control (AGC).

Thus, it is possible to simultaneously measure the attenuation, phase

0 shift introduced by the studied quadrupole, and receive the output signal in the form of sequentially appearing power components, as well as expand the dynamic range. The signal after the first amplifier 11 of the intermediate frequency can be written as 4 CAC pCCHCO5Y, 1 npnOit yi t, iKxApCoSc xCo n, t where I1 is gTP,. The signal at the output of the synchronous detector b, taking into account the fact that the phase of the reference signal arriving at the reference input of the synchronous detector 6, accepts discrete states O, 180 ° with frequency p. 2 t, 27, has the form 4Aj, - (4

Claims (1)

DEVICE FOR-MEASUREMENT. ATTENUATION AND PHASE SHIFT OF THE FOUR-POLE MICROWAVES, comprising a microwave generator, serially connected first and second phase manipulators, an adder, the second input of which is connected to the output of the microwave generator, and a first detector, a synchronous detector, a square-wave generator, the output of which is connected to the modulating input of the first phase manipulator through the first frequency divider - with the modulating input of the second phase manipulator, while the output of the microwave generator and the input of the first phase manipulator are respectively by the way and the output for connecting the studied microwave four-terminal network, and, furthermore, in order to expand the dynamic range and obtain information on the phase shift 'and attenuation in the form of signals proportional to the quadrature components,' 'between the output of the first detector and the input of the synchronous detector are sequentially connected controlled discrete attenuator and the first intermediate frequency amplifier, between the output of the first frequency divider and the reference input of the synchronous detector, the second a frequency liner and a third phase manipulator, the modulating input of which is connected to the output of the square-wave pulse generator, the first and second phase detectors and the second detector, the output of which is connected to the control input of a controlled discrete attenuator, are connected in parallel to the output of the second intermediate-frequency amplifier, the output of the second frequency divider is connected with the reference input of the second phase detector and through the introduced fourth phase manipulator with the reference input of the first phase detector, and between the house of the second frequency divider and the modeling input of the fourth phase manipulator includes a third frequency divider, while the outputs of the first and second phase detectors and the second detector are respectively outputs of signals proportional to the quadrature components, phase-. shift and attenuation.