Research on W-band wideband radar imaging technology based on microwave photonics technology
As an important research direction of the radar system,W-band inverse synthetic aperture radar(ISAR),which is featured by high resolution,long detection range,miniaturization and lightweight,can be used as airborne,missile-borne and spaceborne applications.Microwave photonics technology is the main means to overcome the electronic bottleneck effect of the conventional radar due to high frequency band,large bandwidth and low loss transmission.A W-band frequency-modulated ISAR imaging system is proposed based on microwave photonics technology.In the transmitter,a W-band linearly frequency-modulated(LFM)signal with an instantaneous bandwidth of 8 GHz is generated using microwave photonic frequency multiplication.In the receiver,target echo signals are de-chirped based on microwave photonic de-chirp receiving.ISAR imaging simulation results show that the contours of the target in different postures are clear and discernible.
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