一种板线馈电背腔式振子馈源的设计

Design of Cavity-backed Dipole Feed with Board Line Feeding

背腔式振子馈源体积小、结构简单、调节灵活、电气性能好等优点,并且采用板线的形式进行馈电后,可以实现良好的宽带匹配性能。这种馈源由辐射振子、反射腔及其馈电部分组成,馈电部分采用板线形式并且具有便于调节的短路片。实测结果表明,这种馈源具有较宽的匹配和方向图带宽。该馈源尤其适用于L波段或S波段等频率较低的频段,用作前馈反射面天线的馈源。

The cavity-backed dipole feed has such characteristics as small size, simple configuration, flexible adjustment and good electric performance, which can realize broadband matching performance fed by a board line. It consists of radiating dipoles, a cavity and feeding part which uses board line type and has adjustable short-circuit patches. The experimental results show that the feed has wider bandwidth performance about matching and patterns and it is especially suitable for the L or S band and used as the feed of front-fed reflector antenna.