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引言本文提出的新型喇叭辐射器的设计非常适合用于卡塞格伦天线的馈源。这一设计的特点是:(1)E—面和H—面束宽相等;(2)E—面和H—面内旁瓣低;(3)由于结构对称可产生圆极化或任意线极化;(4)结构简单从而保证了制造的经济性,最小损耗和低电压驻波比。文中虽然只讨论了方截面角锥喇叭,但此种方法同样适用于圆锥喇叭。方口径角锥喇叭H—面与E—面3分贝束宽比的理论值为1.35(假定TE_(10)口径场具有半正弦波的H—面分布和为常数的E—面分布)。旁瓣电平分别低于主波
Introduction The design of the new horn radiator proposed in this paper is well suited for the feed of Cassegrain antennas. The features of this design are: (1) E-face and H-face beam width are equal; (2) E-face and H-facet low sidelobes; (3) Circular polarization or arbitrary line Polarization; (4) simple structure to ensure the manufacturing economy, minimum loss and low voltage standing wave ratio. Although only the square cross section pyramid horn is discussed in this paper, the same applies to the cone horn. The theoretical value for the square decibel horn H-plane to E-plane with a 3 dB beamwidth ratio is 1.35 (assuming that the TE_ (10) aperture field has a half-sine H-plane distribution and a constant E-plane distribution). Sidelobe levels were lower than the main wave