地面站天线的先进设计理念

A. Cha, D. Bathker, W. Williams
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引用次数: 8

摘要

大型地面站天线传统上是对称卡塞格伦双反射型。本文探讨了透明孔径(无阻塞)设计、偏置双形反射器和双频带馈电系统等新概念作为未来大孔径地面设施的可能。结果表明,与标准对称系统相比,偏置双反射器具有更优越的性能。利用一种新发展的综合方法,考虑了地面站用偏置双形反射器的理论设计。讨论了馈源设计和工程方面的最新创新,包括NASA/JPL 64米和34米天线项目的S/X二向色反射系统以及正在开发的双波段共孔径波纹馈源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Advanced Design Concepts in Ground Station Antennas
Large ground station antennas traditionally are of the symmetric Cassegrainian dual reflector type. New concepts, such as clear aperture (no blockage) designs, offset dual shaped reflectors and dual frequency band feed systems are examined in this paper as possible future large aperture ground facilities. It is shown that offset dual reflectors offer prospectively superior performance compared to the standard symmetric system. Theoretical designs of offset dual shaped reflectors for ground station applications are considered utilizing a newly developed synthesis approach. Recent innovations in feed design and engineering, including the S/X dichroic reflex system for the NASA/JPL 64-m and 34-m antenna projects and a dual band common aperture corrugated feed under development are discussed.
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