Apparatus and method for comb spectrum generator phase spectrum calibration

Abstract

The invention discloses an apparatus for comb spectrum generator phase spectrum calibration. The apparatus includes a first microwave signal input end and a second microwave signal input end, a quadrature coupler which generates two paths of sinusoidal signals of which the phase difference is 90 degrees based on first microwave signals, a power divider which divides second microwave signals into a first path of signals and a second path of signals, a driving signal input end which provides driving signals for a calibrated comb spectrum generator, a time-domain waveform output end which outputs time-domain waveforms generated by the calibrated comb spectrum generator, a sampling oscilloscope which acquires data which are generated based on the two paths of sinusoidal signals of which the phase difference is 90 degrees and are required by time base distortion calculation, and the time-domain waveforms generated by the calibrated comb spectrum generator under the triggering of the second path of signals, and a phase calibration unit which performs phase spectrum calibration on the calibrated comb spectrum generator based on the data required by the time base distortion calculation and the time-domain waveforms generated by the calibrated comb spectrum generator. With the apparatus adopted, the problem of influence of time base distortion on calibration results in the phase calibration process of the comb spectrum generator can be solved.

Description

technical field [0001] The invention relates to phase spectrum calibration technology. More specifically, it relates to a device and method for phase spectrum calibration of a comb spectrum generator. Background technique [0002] As a harmonic phase standard, the comb spectrum generator has been widely used in the fields of nonlinear vector network analyzer phase calibration and nonlinear device characteristic characterization. At present, the phase spectrum calibration of comb spectrum generator is still in the exploratory stage in China, and the commonly used calibration equipment is sampling oscilloscope. There are two main difficulties in the calibration of the comb spectrum generator: one is to select different time delays in the data acquisition window of the sampling oscilloscope, and the corresponding phase spectrum of the comb spectrum generator is not the same, because the signal is shifted in the time domain, It is equivalent to adding a linear increment to the...

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Problems solved by technology

[0003] An object of the present invention is to provide a device for calibrating the phase spectrum of a comb generator, which solves the calibration problem of the phase spectrum of the comb generator and simultaneously solves the problem of time base distortion in the phase calibration process of the comb generator. The problem of the influence of the calibration results, and when the data acquisition window of the sampling oscilloscope is selected with different time delays and different measurement systems are used, the phase spectrum of the comb generator is processed to obtain consistent and comparable calibration results

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