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本文发展了Peter.W.Hannan的“从卡塞格伦(Cassegrain)望远镜导出的微波天线”一文,首次提出了双付反射面形式的微波天线。介绍了它的组成、放大率及等效概念。具体地给出了不同馈源的卡塞格伦式的双付反射面天线的设计考虑及放大率的选取。最后,在f_Ⅰ和f_Ⅱ的两个频段上,设计了典型的双付反射面天线——卡塞格伦式双付反射面天线,比较了理论与实践的结果。双付反射面天线为频率复用和极化复用提供了一个新颖的天线形式。
This article develops the article “Microwave Antennas Derived from the Cassegrain Telescope” by Peter.W. Hannan, and for the first time presents a microwave antenna in the form of a double reflective reflector. Introduced its composition, magnification and equivalent concept. In particular, the design considerations and magnification of the Cassegrain dual-reflector antenna with different feed sources are given. Finally, on the two frequency bands of f_I and f_II, a typical dual-reflector antenna, the Cassegrain dual-reflector antenna, is designed. The theoretical and practical results are compared. The dual-reflector antenna provides a novel antenna format for frequency reuse and polarization multiplexing.