Design of a W-band Dual-polarization Monopulse Reflector Antenna
Keywords:
Dual-polarization, monopulse, reflector antenna, W-bandAbstract
This paper introduces a W-band dualpolarization reflector antenna which combines one dualpolarized transmit-receive SUM channel and two singlepolarized DIFF receiving channels. The feed of the antenna consists of four OMTs (Orth Mode Transducer) to realize dual-polarization monopulse angle measurement. Four horns of the feed are combined into one radiation aperture by a coupled retracted structure to decrease side-lobes. The SUM beam gain of the proposed antenna is over 41 dBi and the aperture efficiency of 60% is achieved, cross-polarization level is better than –43 dB. The first sidelobe level is better than -30dB. The nulldepth is better than -20dB.
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References
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