Phase noise calibrating device based on photoelectric fusion technique

Abstract

The invention discloses a phase noise calibrating device based on a photoelectric fusion technique, which comprises a microwave amplifier (2), a power divider (3), a phase shifter (4), a modulator (5), an attenuator (6) and a phase noise measurement system (10), and further comprises a photoelectric oscillator (1), a microwave noise source (9), a broadband amplifier (8) and a band-pass filter (7). The photoelectric oscillator is developed through the photoelectric fusion technique, so the phase noise calibrating device has a large phase noise standard dynamic range and a simple structure, and can calibrate the phase noise measurement result precision, so the defects of the existing calibrating method are overcome, and thus, the phase noise measurement result precision traceability of a microwave frequency band is obtained.

Description

technical field [0001] The invention relates to a phase noise calibration device, in particular to a phase noise calibration device based on photoelectric fusion technology. Background technique [0002] The current phase noise measurement devices on the market mainly include the imported HP3047A, HP3048A, E5500 series and PN9000, etc. The components of these devices mainly include phase detectors, phase-locked loops, low-noise amplifiers, data acquisition and computers. According to the national military standard GJB / G3414-98 "Phase Noise Test System Verification Regulations", some of its indicators can be calibrated / verified, but the accuracy of the phase noise measurement results of the phase noise measurement system cannot be calibrated / verified. [0003] At present, only the NIST laboratory has established a phase noise standard device in the world, but the carrier source used in the microwave frequency band is a microwave oscillator that is currently widely used, inclu...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a phase noise calibration device based on photoelectric fusion technology to solve the problem of poor dynamic range of phase noise traceability phase noise standards, complex structure, expensive price, and no accuracy of phase noise measurement results in the entire Fourier analysis frequency range. For calibration, the comparison measurement accuracy is not high, the measurement uncertainty is 3dB, the measurement result cannot be given immediately, and it needs to be compared with multiple units before statistics can be obtained.

Images