doi:

DOI: 10.3724/SP.J.1010.2013.00545

Journal of Infrared and Millimeter Waves (红外与毫米波学报) 2013/32:6 PP.545-549

Design of 300 mm W-band radiometer offset-feed reflector antenna


Abstract:
A 300 mm offset-feed reflector antenna was designed for a W-band radiometer.Its parameter are 94.5 GHz operating frequency,sidelobe level of less than-25 dB,cross polarization level of less-30 dB and half-power beamwidth of better than 1°.A smaller offset angle was adopted to improve the antenna cross polarization characteristics.This matching feed is designed with the focal plane field matching method and the modulus ratio method.It is optimized to get good VSWR and lobe equalizing level.Measurement results show that this antenna meets the requirements of the radiometer.Its measured and theoretical values are coincided.

Key words:W-band,offset fed reflector antenna,matching feed,modulus ratio method

ReleaseDate:2015-05-04 09:28:19



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