Compact Wideband Corrugated Feedhorns With Ultra-Low Sidelobes for Very High Performance Antennas and Quasi-Optical Systems

被引:31
作者
McKay, Johannes E. [1 ]
Robertson, Duncan A. [1 ]
Cruickshank, Paul A. S. [1 ]
Hunter, Robert I. [1 ]
Bolton, David R. [1 ]
Wylde, Richard J. [1 ]
Smith, Graham M. [1 ]
机构
[1] Univ St Andrews, Sch Phys & Astron, SUPA, Millimetre Wave & EPR Grp, St Andrews KY16 9SS, Fife, Scotland
基金
英国工程与自然科学研究理事会;
关键词
Beam coupling; corrugated feedhorn; Gaussian beams; quasi-optics; ultra-low sidelobes; OPTIMIZATION; DESIGN; HORNS; MODE;
D O I
10.1109/TAP.2013.2243097
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
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 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 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.
引用
收藏
页码:1714 / 1721
页数:8
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