Wideband Corrugated Feedhorns, for Radar, Communications, Radiometry and Quasi-Optics
A wide variety of desirable antenna beam patterns can be synthesized by optimal excitation and phasing of the HE<sub>11</sub> and HE<sub>12</sub> modes in scalar corrugated feedhorns. However, the bandwidth of such two-mode horns is often limited by modal dispersion. In this...
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Open Journal of Antennas and Propagation |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9849676/ |
| _version_ | 1811183118529331200 |
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| author | Daniel J. Sung Nina Thomsen Stuart Macpherson Robert I. Hunter Samiur Rahman Duncan A. Robertson Richard J. Wylde Graham M. Smith |
| author_facet | Daniel J. Sung Nina Thomsen Stuart Macpherson Robert I. Hunter Samiur Rahman Duncan A. Robertson Richard J. Wylde Graham M. Smith |
| author_sort | Daniel J. Sung |
| collection | DOAJ |
| description | A wide variety of desirable antenna beam patterns can be synthesized by optimal excitation and phasing of the HE<sub>11</sub> and HE<sub>12</sub> 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 HE<sub>11</sub> mode for single-mode excitation of corrugated pipe transmission lines; 2) a LG<sub>00</sub> and LG<sub>02</sub> combination for radiometry, with narrow beams; 3) a pure Laguerre Gaussian LG<sub>00</sub> 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 <inline-formula> <tex-math notation="LaTeX">${\text{HE}}_{1n}$ </tex-math></inline-formula> modes, to synthesize symmetric output beams at any desired frequency or gain. |
| first_indexed | 2024-04-11T09:41:23Z |
| format | Article |
| id | doaj.art-cdf7f2dd811a4745a968f18aed90ae57 |
| institution | Directory Open Access Journal |
| issn | 2637-6431 |
| language | English |
| last_indexed | 2024-04-11T09:41:23Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of Antennas and Propagation |
| spelling | doaj.art-cdf7f2dd811a4745a968f18aed90ae572022-12-22T04:31:11ZengIEEEIEEE Open Journal of Antennas and Propagation2637-64312022-01-01397098310.1109/OJAP.2022.31921159849676Wideband Corrugated Feedhorns, for Radar, Communications, Radiometry and Quasi-OpticsDaniel J. Sung0Nina Thomsen1Stuart Macpherson2Robert I. Hunter3https://orcid.org/0000-0002-0415-9540Samiur Rahman4https://orcid.org/0000-0002-5477-4218Duncan A. Robertson5https://orcid.org/0000-0002-4042-2772Richard J. Wylde6Graham M. Smith7https://orcid.org/0000-0001-6578-7412School of Physics and Astronomy, University of St Andrews, St Andrews, U.K.School of Physics and Astronomy, University of St Andrews, St Andrews, U.K.School of Physics and Astronomy, University of St Andrews, St Andrews, U.K.School of Physics and Astronomy, University of St Andrews, St Andrews, U.K.School of Physics and Astronomy, University of St Andrews, St Andrews, U.K.School of Physics and Astronomy, University of St Andrews, St Andrews, U.K.School of Physics and Astronomy, University of St Andrews, St Andrews, U.K.School of Physics and Astronomy, University of St Andrews, St Andrews, U.K.A wide variety of desirable antenna beam patterns can be synthesized by optimal excitation and phasing of the HE<sub>11</sub> and HE<sub>12</sub> 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 HE<sub>11</sub> mode for single-mode excitation of corrugated pipe transmission lines; 2) a LG<sub>00</sub> and LG<sub>02</sub> combination for radiometry, with narrow beams; 3) a pure Laguerre Gaussian LG<sub>00</sub> 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 <inline-formula> <tex-math notation="LaTeX">${\text{HE}}_{1n}$ </tex-math></inline-formula> modes, to synthesize symmetric output beams at any desired frequency or gain.https://ieeexplore.ieee.org/document/9849676/Aperture antennasantenna feedscorrugated hornshorn antennasquasi-opticsultra-wideband antennas |
| spellingShingle | Daniel J. Sung Nina Thomsen Stuart Macpherson Robert I. Hunter Samiur Rahman Duncan A. Robertson Richard J. Wylde Graham M. Smith Wideband Corrugated Feedhorns, for Radar, Communications, Radiometry and Quasi-Optics IEEE Open Journal of Antennas and Propagation Aperture antennas antenna feeds corrugated horns horn antennas quasi-optics ultra-wideband antennas |
| title | Wideband Corrugated Feedhorns, for Radar, Communications, Radiometry and Quasi-Optics |
| title_full | Wideband Corrugated Feedhorns, for Radar, Communications, Radiometry and Quasi-Optics |
| title_fullStr | Wideband Corrugated Feedhorns, for Radar, Communications, Radiometry and Quasi-Optics |
| title_full_unstemmed | Wideband Corrugated Feedhorns, for Radar, Communications, Radiometry and Quasi-Optics |
| title_short | Wideband Corrugated Feedhorns, for Radar, Communications, Radiometry and Quasi-Optics |
| title_sort | wideband corrugated feedhorns for radar communications radiometry and quasi optics |
| topic | Aperture antennas antenna feeds corrugated horns horn antennas quasi-optics ultra-wideband antennas |
| url | https://ieeexplore.ieee.org/document/9849676/ |
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