SU1492310A1 - Panoramic four-terminal network gain meter - Google Patents

Abstract

This invention relates to a radio measurement technique on microwave. The purpose of the invention is to expand the functionality. Panoramic meter cal. quadrupole 4 transmissions contains rc 1 oscillating frequency, microwave key 2, directional couplers 3 and 5, matched load 6, detectors 7 and 8, ratio meter 9, oscillographic indicator 10, rm 11 sweep, control source 12 , frequency dividers 13 and 14, phase detector 15, band-pass filter 16, synchronous detector 17 and switches 18 and 19. The goal is achieved by making it possible to measure the group delay time of a measured quadrupole 4. Phase detector 15 is turned on between the inputs of meter 9 to The second group latency information comes through the band-pass filter 16 to the synchronous detector 17 and then through the switch 18 to the indicator 10. 2 Il.

Description

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The invention of technology

Ralcho and measurements on the microwave and can be used in the construction of measuring partimeters of acypical and passive SECH devices.

The aim of the invention is to expand the functionality.

FIG. 1 shows the structural electrical circuit of the four-port transmission coefficient meter; in fig. 2 is a diagram showing the operation of the meter.

The panoramic meter of the quadrupole transmission coefficient includes a sweep frequency generator 1, a microwave switch 2, the first directional coupler 3, the measured quadrupole 4, the second directional coupler 5 and the matched load 6 the first 7 and second 8 detectors, the meter 9 relations, oscillographic indicator 10, sweep generator 11, control signal source 12, first 13 and second 14 frequency dividers, phase detector 15, band-pass filter 16, synchronous detector 17, first 18 and second 19 switches.

Panoramic measuring instrument of the transfer of the quadrupole works as follows.

From generator 1, the microwave signal is sent to the microwave key 2, where it is modulated, and through the directional coupler 3 to the measured quadrupole 4. Next, through the first directional coupler 5, the SBSh signal arrives at the matched load 6. Branched signals detected first 7 and the second 8 detectors, postut on the corresponding inputs of the meter 9. In order to make it possible to measure the group delay time (DTP) of the measuring of the quadrupole 4, the phase detector is switched between the inputs of the 9 ratio meter p 15, the information from the high voltage level from which via the band-pass filter 16 goes to the synchronous detector 17 and then through the first switch I8 to the oscillographic indicator 10. The microwave signal is modulated by the microwave switch 2 through the second switch 19 alternately with the frequency fMoq o source 12 or frequency (where n. 1.,. I O) from the first divider often II. 13 (Fig. 2, a). The control of commutaping switch 1 9 comes from HTopoi o del11T (M1 1 frequency with frequency fnoq / n (Lig.2, This same frequency f / nog / n receives n control input of the synchronous detector 17. As a result of alternating modulation at the output phase detector 15 is formed alternately

the signal and (Fig. 2, c), is proportional to the phase delay of the microwave signal for the modulating frequency f / noi or after switching the switch 19, the signal UQ (Fig. 2, c) is proportional to the phase delay of the absorbing microwave signal for the modulating signal frequency / P.

With the GDZ of the quadrupole under study, equal to O, U 11. With the GDZ increasing, the difference (MJ (U - U) increases in proportion to the GDZ), and the voltage uU is modulated by the frequency fМ09 / i.e.

(figure 2, g). Consequently, this voltage can be detected by a conventional synchronous detector 17, the control input of which receives a signal with a frequency f / MO / n. Indications

the magnitude of the GDT or the transmission coefficient of the studied quadrupole occurs in the oscillographic indicator 10, to the input of which the measured values are received through the first switch 18.

The horizontal scan of the oscillographic indicator is controlled by the sawtooth voltage of the generator 11, which also controls the frequency of the generator 1.

From the amplification channel of the incident wave in the meter 9, a portion of the signal enters generator 1 for automatically maintaining at a constant

level of the signal power.

Thus, the panoramic four-pole transfer meter allows, in addition to attenuation (or gain), to measure the GDT

quadripole, i.e. has more functionality.

Claims (1)

Formula of the invention Panoramic multi-pass ratio meter containing oscillating frequency generator, microwave key, first and second directional breakers, matched to “w Afl. UY "/ c uu one/. I