Compact Wideband Corrugated Feedhorns With Ultra-Low Sidelobes for Very High Performance Antennas and Quasi-Optical Systems
Compact Wideband Corrugated Feedhorns With Ultra-Low Sidelobes for Very High Performance Antennas and Quasi-Optical Systems
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DOI：
10.1109/tap.2013.2243097
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发表时间：
2013-01
影响因子：
5.7
通讯作者：
J. McKay;D. Robertson;P. Cruickshank;R. Hunter;D. Bolton;R. Wylde;Graham M. Smith
中科院分区：
文献类型：
--
作者：
J. McKay;D. Robertson;P. Cruickshank;R. Hunter;D. Bolton;R. Wylde;Graham M. Smith
波纹或标量喇叭天线由于其高的波束对称性、相对较低的副瓣电平以及与基模高斯波束的强耦合，在毫米波和亚毫米波系统中得到了广泛的应用。然而，对于诸如毫米波宇宙学、空间实验或甚至高性能成像的应用，存在减小喇叭的尺寸同时保持非常高的性能水平的一般要求。在本文中，我们描述了一个通用的分析方法设计紧凑的双轮廓波纹喇叭具有极低的副瓣水平。我们证明，这是可能的，以实现${-}50$ dB的旁瓣电平，在较宽的带宽与短的喇叭，我们认为这代表了国家的最先进的性能。我们还证明了实验一个简单的标量设计，工作在宽带宽，可以实现旁瓣优于${-}40$ dB，同时保持频率独立的相位中心。这种设计方法已通过实验验证的成功制造和特性的喇叭天线在94 GHz和340 GHz的雷达和准光学仪器的应用。
The corrugated or scalar feedhorn has found many applications in millimeter wave and sub-millimeter wave systems due to its high beam symmetry, relatively low sidelobe levels and strong coupling to the fundamental mode Gaussian beam. However, for applications such as millimeter wave cosmology, space-based experiments, or even high performance imaging, there is a generic requirement to reduce the size of horns whilst maintaining very high levels of performance. In this paper we describe a general analytic methodology for the design of compact dual-profiled corrugated horns with extremely low sidelobe levels. We demonstrate that it is possible to achieve ${-}50$ dB sidelobe levels, over wide bandwidths with short horns, which we believe represents state-of-the-art performance. We also demonstrate experimentally a simple scalar design that operates over wide bandwidths and can achieve sidelobes of better than ${-}40$ dB, whilst maintaining a frequency independent phase center. This design methodology has been validated experimentally by the successful manufacture and characterization of feedhorns at 94 GHz and 340 GHz for both radar and quasi-optical instrumentation applications.