基 于 参 数 外 推 的 超 宽 带 雷 达 有 源 极 化 校 准 技 术

Polarimetric active radar calibrator (PARC) are widely used in the field of radar polarization calibration due to its high radar cross section and high signal-to-noise ratio. A parameter extrapolation based active polarization calibration technique for ultrawide-band radar is proposed to address the problem that PARC system can only operate in fixed frequency bands and limited bandwidth, which limits their use in polarization calibration. Using spectral estimation methods to extrapolate the polarization calibration parameters of the calibrator corresponding frequency band to other frequency bands, and then processing the corresponding frequency bands to broaden the operating frequency range of the active polarization calibrator. The PARC with a working frequency of 8~12 GHz is used to calibrate the 4~16 GHz fully polarized radar. The original calibration parameters and extrapolated calibration parameters achieved good polarization calibration results in their respective frequency bands, proving the effectiveness and engineering practical value of the proposed method.