以天线口径效率为目标,研究了四脊喇叭口径对馈源波束等化、波束宽度恒定和天线口径效率等性能的影响,得到了一种3:1带宽高效率圆四脊喇叭馈源的设计。该馈源在整个频带内具有较低的电压驻波比,三个主平面的主极化方向图波束等化较好,-10 dB波束宽度基本恒定,且天线口径效率达到55%以上。

The antenna aperture efficiency is regarded as the goal of quad-ridged flare horn (QRFH) feed design and the effects of its diameter on beam symmetry, beamwidth constancy and antenna aperture efficiency are studied. A high-efficiency QRFH design with 3:1 bandwidth is given. The calculated results show that a low reflection, a main lobe with near-constant symmetrical beamwidth and more than 55% antenna aperture efficiency are realized across the bandwidth.

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