| Title: |
Wideband corrugated feedhorns, for radar, communications, radiometry and quasi-optics |
| Authors: |
Sung, Daniel; Thomsen, Nina; Macpherson, Stuart; Hunter, Robert I.; Rahman, Samiur; Robertson, Duncan A.; Wylde, Richard J.; Smith, Graham M. |
| Contributors: |
EPSRC; University of St Andrews.School of Physics and Astronomy |
| Publication Year: |
2022 |
| Collection: |
University of St Andrews: Digital Research Repository |
| Subject Terms: |
Aperture antennas; Antenna feeds; Corrugated horns; Horn antennas; Quasi-optics; Ultra-wideband antennas; QC Physics; T-NDAS; MCC; QC |
| 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. ; 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. ; Peer reviewed |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| ISBN: |
978-85-13-57626-7; 85-13-57626-3 |
| Relation: |
IEEE Open Journal of Antennas and Propagation; 280731332; 85135762637; 000848216400001; https://hdl.handle.net/10023/26509; https://www.scopus.com/pages/publications/85135762637; EP/R013705/1; EP/K503940/1; EP/R511778/1 |
| DOI: |
10.1109/OJAP.2022.3192115 |
| Availability: |
https://hdl.handle.net/10023/26509; https://doi.org/10.1109/OJAP.2022.3192115; https://www.scopus.com/pages/publications/85135762637 |
| Rights: |
Copyright 2022 The Author(s). This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/. |
| Accession Number: |
edsbas.4C5D9032 |
| Database: |
BASE |