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A dual-beam Cassegrain antenna at 360GHz was designed and manufactured for radiation measurement at submillimeter wave band. A diagonal horn was selected as feed. Two feeds were set side by side for object locating. Comparative tests were taken between the Cassegrain antenna and a diagonal horn antenna through a passive detecting system. The parameters of Cassegrain antenna such as gain are estimated.
A Ka band Cassegrain monopulse antenna has been designed and measured. The tapered rod antennas are used as the feeds of the Cassegrain antenna because their blockage is small and their bandwidths are very wide. The measurements show that the gain of sum pattern is 28 dBi, the sidelobe levels of the sum pattern are less -15 dB, the null depths of the difference pattern are less then -25 dB and the...
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