This paper presents an E-band axial displaced ellipse (ADE) reflector antenna with the characteristics of both high aperture efficiency and adjustable beamwidth. Optimization of slightly shaping the subreflector is adopted for a higher aperture efficiency of the entire antenna. Defocusing effect of moving the subreflector can effectively increase the beamwidth, and half-power beamwidth (HPBW) is adjusted by axially moving the subreflector. The reflector antenna is simulated, fabricated and measured. The aperture efficiency is increased to approximately 75% after optimization. The measured gain of 45.6 ± 1 dBi from 71 to 86 GHz agrees well with the simulation. Also, the measured HPBW achieves an increase of more than five times changing from 0.88° to 4.4° at 71GHz, 0.86°-5° at 86GHz. It is the first time to achieve high aperture efficiency ADE reflector antenna with adjustable beamwidth, which is of great significance for compact aircraft antenna applications.

中文翻译：

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波束宽度可调的E波段高孔径效率反射器天线

本文介绍了一种E波段轴向位移椭圆（ADE）反射器天线，它具有高孔径效率和可调波束宽度的特点。采用对副反射器微整形的优化，以提高整个天线的孔径效率。移动副反射镜的散焦效应可以有效增加波束宽度，通过轴向移动副反射镜来调整半功率波束宽度（HPBW）。反射器天线被模拟、制造和测量。优化后孔径效率提高到约75%。从 71 到 86 GHz 的 45.6 ± 1 dBi 测量增益与模拟非常吻合。此外，测得的 HPBW 在 71GHz 时从 0.88° 变为 4.4°，增加了 5 倍以上，0.86° -86GHz 时为 5°。首次实现波束宽度可调的高孔径效率ADE反射面天线，对于紧凑型飞机天线应用具有重要意义。