Wideband corrugated feedhorns, for radar, communications, radiometry and quasi-optics
Date
29/08/2022Author
Grant ID
EP/R013705/1
EP/K503940/1
EP/R511778/1
Keywords
Metadata
Show full item recordAbstract
A wide variety of desirable antenna beam patterns can be synthesized by optimal excitation and phasing of the HE11 and HE12 modes in scalar corrugated feedhorns. However, the bandwidth of such two-mode horns is often limited by modal dispersion. In this paper we introduce a class of low dispersion, two-mode feedhorns that can operate, in some cases, over operating bandwidths of 40-50%. We provide example designs that include horns with high coupling efficiency to: 1) a pure HE11 mode for single-mode excitation of corrugated pipe transmission lines; 2) a LG00 and LG02 combination for radiometry, with narrow beams; 3) a pure Laguerre Gaussian LG00 mode for quasi-optical instrumentation with constant phase centers; 4) a constant gain antenna for uniform illumination with frequency; 5) Airy patterns or “top hat” patterns for radar or communications applications, designed to maximize aperture efficiencies when used with larger reflect or lens antennas. More generally, we show methods to generate and phase multiple HE1n modes, to synthesize symmetric output beams at any desired frequency or gain.
Citation
Sung , D , Thomsen , N , Macpherson , S , Hunter , R I , Rahman , S , Robertson , D A , Wylde , R J & Smith , G M 2022 , ' Wideband corrugated feedhorns, for radar, communications, radiometry and quasi-optics ' , IEEE Open Journal of Antennas and Propagation , vol. 3 , 9849676 , pp. 970 - 983 . https://doi.org/10.1109/OJAP.2022.3192115
Publication
IEEE Open Journal of Antennas and Propagation
Status
Peer reviewed
ISSN
2367-6431Type
Journal article
Description
Funding: This work was supported in part by Engineering and Physical Sciences Research Council, U.K., under Grant EP/R013705/1, and in part by IAA Funding.Collections
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