一种高效率五焦点抛物反射面天线的设计

文章介绍了一种基本抛物面轴向6i指向-20°、-10°、0°、＋10°和＋20°的五焦点抛物反射面天线的设计，波束指向分别为-17．2°、-8．67°、0°、8．67°、17．2°。通过优化基本反射面的加权系数进行反射面的赋形，使每个波束的增益趋于均匀。对于标准偏置偏焦抛物面天线，波束指向±17．2°、±8．67°和0°时的增益分别为34．87dBi、38．67dBi和40．15dBi，边缘波束与中心波束的增益差值分别为5．28dBi和1．48dBi。用文中提出的方法得出对应波束的增益分别为36．10dBi、38．48dBi和39．14dBi，边缘波束与中心波束的增益差为3．03dBi和0．66dBi，与标准抛物面相比减小了2．24dBi和0．82dBi。

Five-focal Paraboloid Design for High Efficiency Reflector Antenna

A five-focal paraboloid reflector antenna with the orientation of the paraboloid axes δi of each fun-damental paraboloid are -20°, -10° ,0°, ＋ 10°, ＋ 20° is designed. The beams direction at -17.2°, -8.67°, 0° ,8.67° ,17.2°. By optimizing the weighting coefficients of the fundamental paraboloids, the gain of each beam of the shaped reflector are nearly equal. From the results of simulation for standard offset parabolic reflector antenna, the gain of beams at ± 17.2°,±8.67° and 0° are 34. 87dBi,38.67dBi and 40. 15dBi. The gain differences between edge beams and focus beam are 5.28dBi and 1.48dBi. From the results of simulation for five-focal paraboloid reflector antenna, the gain are 36. 10dBi for beams at ± 17.2° ,38.48dBi beams at ±8.67° and 39. 14dBi beam at 0°. The gain differences are 3.04dBi and 0. 66dBi, which are 2. 24dBi and 0, 82dBi smaller than that of standard parabolic.