Branch-loaded cavity-backed helical antenna based on UHF (Ultra High Frequency) band

A stub-loaded cavity-backed helical antenna based on a UHF (Ultra High Frequency) band comprises a short-line helical strip line, a medium support cylinder, a tail-end short-circuit stub, a radiation back cavity and a non-contact magnetic coupling cavity feed conversion section, and is based on the design of the short-line helical strip line, the loading short-circuit stub and the non-contact magnetic coupling cavity feed conversion section. The problems that an existing circular polarization feed source is high in structural size profile in the UHF band, poor in high-power PIM performance, difficult to adapt to a satellite platform and incapable of meeting the requirement of mobile communication are solved. 一种基于UHF频段的枝节加载背腔螺旋天线，包括短线螺旋带线、介质支撑筒、末端短路枝节、辐射背腔、非接触式磁耦合腔体馈电变换段，基于短线螺旋带状线、加载短路枝节和非接触式磁耦合腔体馈电变换段的设计，解决了现有圆极化馈源在UHF频段结构尺寸剖面高、大功率PIM性能较差，难以适应卫星平台、无法满足移动通信需求的问题。