Dual polarization radar arbitrary polarization wave on-line calibrating method
A calibration method and polarized wave technology, applied in radio wave reflection/re-radiation, radio wave measurement system, using re-radiation, etc., can solve large errors, inability to modulate radio frequency signals, insufficient polarization purity of polarized waves, etc. question
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[0032] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:
[0033] 1. Polarization control
[0034]The on-line calibration technology of dual-polarization radar requires the ability to generate various required polarization calibration signals, that is, to continuously adjust the amplitude and phase of the two orthogonal polarization signals, and synthesize arbitrary polarization waves. For this reason, the polarized wave control method used in the present invention will be introduced first.
[0035] Such as figure 2 As shown, the transmission signal generated by the radar transmitter or signal generator is divided into two channels by the magic T (MT). The upper arm of the magic T is connected in series with a phase-shift controller θ, and the two signals are synthesized by a 3dB bridge. Another phase-shift controller is connected in series on one arm of another 3dB bridge When the phase θ of the phase shifter and ...
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