SU1596263A1 - Apparatus for measuring phase and frequency fluctuations of signal - Google Patents

Abstract

This invention relates to a microwave technique. The purpose of the invention is to expand the range of operating frequencies. The device contains a microwave path 1, a processing unit 2, a spectrum analyzer 3 and a polyharmonic synchronized generator 4 containing waveguides 5 and 6 of the fundamental frequency and the third harmonic frequency, output and input flanges 7 and 8, short-circuiting pistons 9 and 10 and a semiconductor diode 11 s negative resistance. The introduction of generator 4 into the device allows it to be synchronized by the measured signal at the fundamental frequency harmonic with proportional transfer of the frequency and phase fluctuations of the measured generator in the operating frequency range of the microwave path of the fluctuation meter. In this case, the magnitudes of the frequency and phase fluctuations differ from the measured value by a factor of N, where N = 1.2, ... is the number of the input harmonic used by the generator 4, which ensures an extension of the operating frequency range. 1 il.

Description

The invention relates to microwave technology. The purpose of the invention is the expansion of the operating frequency range .. The device contains a microwave path 1, a processing unit 2, a spectrum analyzer 3 and polyharmo 2

none of the synchronized generator 4, containing the waveguides 5 and 6 of the fundamental frequency and frequency of the third, harmonics, output and input flanges 7 and 8, short nos. 1 rolling pistons 9 and 10 and semiconductor diode 11 with negative resistance. Introduction to the generator device 4 allows it to be synchronized by the measured signal at the fundamental frequency harmonic with proportional transfer of the frequency and phase fluctuations of the measured generator in the operating frequency range of the microwave path of the fluctuation meter. In this case, the magnitudes of the frequency and phase fluctuations differ from the measured value vN times, where N = 1.2 ,, .. is the number of the used input harmonics of the generator 4, which ensures the expansion of the operating frequency range. I il.

1596263 A1

1596263

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The invention relates to the field of microwave, in particular to the technique of measuring fluctuations in the frequency and phase of microwave oscillations, and can be used in measuring devices.

The purpose of the invention is the expansion of the operating frequency range.

The drawing shows a block diagram of a device for measuring phase and | θ frequency fluctuations of a signal.

A device for measuring phase and frequency fluctuations of a signal contains a microwave path 1, a processing unit 2, a spectrum analyzer 3, a polyharmonic synchronized generator 4 containing a waveguide of the fundamental frequency 5, a third harmonic waveguide 6, output and input flanges respectively 7 and 8, short-pistons 2θ 9 and 10, a semiconductor diode with a negative resistance of 11.

Device for measuring phase and frequency fluctuations works as follows. 25

The polyharmonic synchronized generator 4 consists of a cross-shaped articulation of the waveguide of the main frequency 5 and the third harmonic frequency waveguide 6, a diode with a negative resistance 11 is installed in the center of this joint. The third harmonic waveguide 6 ends on one side with the input flange 8 and is the device input ^ 5 and on the other hand - with a short-closing piston 10, the waveguide of the main frequency 5 ends on one side with an output flange 7 and serves to connect a polyharmonic synchro generator 4 and microwave 1, and on the other hand - short-circuited with its piston.

When a signal is applied to the input flange 8, the frequency or phase of which 45 fluctuates, the frequency of the oscillator 4 is synchronized. By moving the short-closing pistons 9 and 10 in waveguides 6 and 7, stable synchronism is achieved. On a nonlinear element — a semiconductor diode — with a negative resistance 11 fluctuation spectrum with

frequency of the third harmonic at the fundamental oscillation frequency of the generator 4, at which power is fed through the output flange 7 to the microwave path 1 and processing unit 2, where frequency frequency microwave fluctuations are converted into amplitude, which are measured by the spectrum analyzer 3. The value of the fluctuations on the measured frequency is more than measured at the frequency of the main harmonic 3 times.

Introduction of a polyharmonic synchronized generator to the device, which is in a certain way enabled, allows it to be synchronized by the measured signal at the fundamental frequency harmonic with proportional transfer of the frequency and phase fluctuations of the measured generator in the operating frequency range of the microwave path of the fluctuation meter.

In this case, the value of the fluctuation of the frequency or phase differs from the measured value VY times, where N = 1.2 .. ·., Is the number of the input harmonic of the synchronized generator used.

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Thus, there is an expansion of the operating frequency range of the proposed device, and also it allows to measure the phase and frequency noise of microwave generators with an operating frequency at which the fluctuation meters are absent due to the complexity of their manufacture.

Claims (1)

Claim A device for measuring phase and frequency fluctuations of a signal, containing a series-connected microwave path, a frequency converter and phase to amplitude, and a spectrum analyzer, characterized in that, in order to expand the operating frequency range, a polyharmonic synchronized oscillator is introduced on a semiconductor diode with negative resistance, the output of which is connected to the input of the microwave path, and the input is the input of the device.