Photon-integrated-circuit-based instantaneous microwave frequency measurement device and method

Abstract

The invention discloses a photon-integrated-circuit-based instantaneous microwave frequency measurement device and a photon-integrated-circuit-based instantaneous microwave frequency measurement method. The device comprises a laser device, a photon integrated circuit, a first photoelectric detector, a second photoelectric detector and a microwave amplitude comparison and signal processing module. The method comprises that: after laser enters the integrated circuit, the laser is divided into two paths, and the two paths of laser are controlled by microwave signals respectively to obtain opposite phase modulation; the upper path of signals and partial lower path of signals are subjected to laser synthesis to form strength signals a; the rest lower path of signals are converted into strength signals b through a waveguide grating; the two signals a and b pass through the photoelectric detectors and then undergo amplitude comparison; and because the response of the waveguide grating is designed into linearity, the monitored parameter and the microwave frequency have a single mapping relationship (direct ratio), so that instantaneous measurement of the frequency of the signals to be measured is realized. The device has largest measurement range under given measurement precision, is calibrated only by a single frequency source, and can measure the central frequency of pulse signals. The device has the advantages of small volume, high reliability, low complexity and the like.

Description

technical field [0001] The invention relates to the fields of microwave photonics and microwave detection, and more specifically relates to a photon type microwave frequency instantaneous measurement technology. Background technique [0002] The instantaneous measurement of microwave frequency is one of the key technologies of electronic countermeasures and microwave detection, which can be used for interception and eavesdropping of radar signals and communication information, electronic jamming and anti-jamming, etc. Due to the limitation of electronic bottleneck and bandwidth, the traditional electronic microwave frequency measurement system is difficult to realize the instantaneous measurement of wide frequency band. In addition, electronic methods also have defects such as large volume, high power consumption, and susceptibility to electromagnetic interference. In order to overcome the shortcomings of electronic methods, a photonic microwave frequency instantaneous meas...

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Problems solved by technology

This scheme has the disadvantages of many adjustment parameters, complex implementation, large volume, low reliability, and high cost.

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