A device for measuring the phase parameters of two-port networks

摘要

The utility model relates to phase measurement technology and can be used for precision measurements of the phase parameters of signals, in particular, in radio engineering systems of optimal linear filtering.;To improve the accuracy of phase measurements in a wide frequency and dynamic range of input signals in the proposed measuring complex, a quadrature signal generator is implemented on the basis of two DDS generators synchronized by a microprocessor, and signal multipliers are based on key synchronous detectors. In this case, the output of one of the DDS generators is connected to the amplifier-limiter of the cosine reference channel of the measuring complex. The output of the second DDS generator is connected to the amplifier-limiter of the sine reference channel of the measuring complex.;The input of the complex is connected to the signal inputs of two key synchronous detectors, the control inputs of which are connected to the corresponding outputs of the amplifier-limiters. The outputs of the synchronous detectors are connected to the measuring inputs of the microprocessor, which performs mathematical processing of the measurement results according to a given algorithm. 1 ill.