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引言采用透镜的各种天线系统在不同的毫米波天线中起着重要的作用。这是因为这些天线系统非常有效地填补了波导喇叭天线和卡塞格伦天线间的空白。波导喇叭限于增益小于30dB 的场合,而卡塞格伦天线是解决增益大于40dB 的系统的有效办法,与这些增益值之间相应的天线方向图,可用相应的最大值之半的波束宽度为2°～5°的透镜系统最有效地产生。各种透镜与微波喇叭天线结合使用已有相当长的时间。一般的设计方法是,把透镜设置在喇叭的孔径上,作为相位校正装置,由它使喇叭相位中心有效点源射出的射线产
Introduction Various antenna systems that use lenses play an important role in different millimeter-wave antennas. This is because these antenna systems fill the gap between the waveguide horn antenna and the Cassegrain antenna very effectively. While the waveguide horn is limited to a gain of less than 30 dB, the Cassegrain antenna is an effective solution to a system with a gain greater than 40 dB and the corresponding antenna pattern between these gain values can be used with a beam width corresponding to half the corresponding maximum value Lens systems of ~ 5 ° are most efficiently produced. A variety of lenses have been used in conjunction with microwave horn antennas for quite a long time. The general design method is to set the lens aperture on the horn, as a phase correction device, which makes the horn phase center of the effective source of radiation emitted