Antenna Gain Calibration Method for Phased Array Wave Spectrometer Based on Particle Swarm Algorithm
The phased array wave spectrometer is a Ku-band real aperture radar that illuminates the sea surface at small inci-dence angles to receive sea surface echo power.It extracts three-dimensional sea surface information by removing radar-related fac-tors like EIRP(Effective Isotropically Radiated Power),antenna patterns,and system loss,which can be measured in a microwave anechoic chamber.However,the antenna pattern's precision is limited,leading to the'concave'anomaly in the backscatter coefficient profile that hinders wave spectrum inversion.To address this,the paper uses particle swarm optimization to correct integral antenna gain.Validation with flight test data shows a 12%improvement in data reliability,supporting operational wave spectrum production.
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维普
