SU1290202A1 - Device for measuring fluctuations of microwave conductivity of active two-terminal networks - Google Patents

Abstract

This invention relates to a radio measurement technique. The purpose of the invention is to expand the functionality by providing measurement of the spectra of fluctuations of the microwave conductivity of active two-terminal networks. The device contains Mr-1 microwave signal, valves 2,6,15,17, attenuators 3,12,14,16, directional couplers 4,5, -dirkul tor 7, measuring chamber 9, transformers 10 and 11 impedance, microwave switch 18, two-channel correlation meter 20 fluctuation, consisting of additional gates 21, 22, attenuators 23, 24, detector sections 25, 26, two-channel low-frequency amplifier 27 of the total difference unit 28, LF analyzer 29 spectrum. The phase shifter 13, a three-decibel bridge 19, the measuring line are newly introduced. The measurement of the spectral densities of all fluctuations is carried out by measuring device 20, which is the load of the output arms of the bridge 19. 1 sludge. with (L ZHZHZrii g with about N5 About ND

Description

The invention relates to a technique of radio measurements and can be used in the development of low-noise generator and amplifying semiconductor devices and in rejecting the noise parameters of microwave diodes.

The purpose of the invention is to expand the functionality by providing measurement of the spectra of fluctuations of the microwave conductivity of active two-terminal networks.

The drawing shows the structural electrical circuit of the device for measuring fluctuations of the microwave conductivity of active two-terminal networks.

A device for measuring fluctuations of the microwave conductivity of active two-pole devices contains a master oscillator 1 of the microwave signal, the first valve 2, the first

, a new attenuator 3, the first directional coupler 4 for controlling the power and frequency of the incident signal, the second directional coupler 5, the second valve 6, the circulator 7, the measuring line 8, the measuring chamber 9, the first transformer 10 impedance, the second transformer 11: impedance, the second attenuator 12, phase shifter 13, third attenuator 14 third valve 15, quarter attenuator 16, fourth valve 17, microwave switch 18, three-digit bridge 19, two-channel correlation meter 20 fluctuations, consisting of: i3 first and second complementary body valves 21 and 22, fifth and sixth attenuators 23 and 24, two detector sections 25 and 26, a two-channel low-frequency low-noise amplifier 27, a sum-difference unit 28 and a low-frequency analyzer 29 of the spectrum.

A device for measuring fluctuations (the RF conductivity of active two-pole works as follows

The microwave signal from the master oscillator 1 through the directional coupler of the channel of the incident wave, the circulator 7 measuring line 8 enters the measuring chamber 9 of the transmission type, which is made on a waveguide section with a height substantially lower than the standard. In this case, the diode (active two-pole) is shifted relative to the axis of the waveguide section to the side wall, which prevents the occurrence of self-oscillations in the entire area of the operating diode bias voltages.

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 the waves.

The first and second impedance transformers 10 and 11 are used to connect the measurement chamber to the rest of the standard section path. The frequency and power of the incident wave are monitored by connecting to the output arm of a directional transmitter 4 corresponding measuring instruments. The power of the incident wave and, accordingly, the amplitude of the microwave voltage on the diode can be controlled by an attenuator 3. The phase discriminator on the three-digit bridge 19 and the phase shifter 13 converts the fluctuations of the phase of the reflected signal into amplitude fluctuations and measure the latter. As a reference signal of the discriminator, the signal of the channel of the incident is used.

The microwave switch 18, together with attenuators 14, 16 and 12, allows to switch the device into measurement modes of amplitude fluctuations of the incident, reflected and transmitted waves, as well as fluctuations of the phase of the reflected or transmitted wave. The spectral densities of all fluctuations are measured by a two-channel correlation meter 20 fluctuations, which is the load of the output arms of the three-digit bridge 19.

the waves.

Claims (1)

Invention Formula A device for measuring fluctuations of the microwave conductivity of active two-terminal devices, including a series-connected master oscillator of the microwave signal, the first valve, the first attenuator, the first directional coupler, the second directional coupler, the second valve and the circulator, are connected in series to the 1st –1st first impedance transformer a pass-through measuring chamber, a second impedance transformer, a third valve, a second attenuator, and a microwave switch; the third arm of the circulator is connected in series through The fourth valve and the third attenuator are connected to the second input of the microwave switch, and the fourth attenuator is connected to the second output of the second directional coupler. distinguished by the fact that, in order to extend the functionality by providing measurement of the spectra of fluctuations312902024 of the microwave conductivity of the active two-microwave switches, to the first and second, introduced serial outputs of a three-junction bridge a phase shifter and a three-channel two-channel correlation bridge, the input of the phase-shifter, the fluctuation meter, and between the gate is connected to the exit of the fourth by the second shoulder of the circulator and the entrance attenuator, to the second input of the three-first impedance transformer A bridge is connected to the output on the measuring line.