Design and Analysis of a Novel Wide-Angle Scanning Stub-Loaded Cavity Array Element
A novel design methodology is presented to mitigate scan blindness in cavity antenna arrays without the need for any changes on the radiating structure itself. For a first proof-of-concept demonstration, a fully PCB-compliant dual-polarized cavity element is loaded by vertical stubs to manipulate th...
| Main Authors: | , , |
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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/9826839/ |
| _version_ | 1811288246288646144 |
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| author | Tobias Chaloun Patrik Gruner Wolfgang Menzel |
| author_facet | Tobias Chaloun Patrik Gruner Wolfgang Menzel |
| author_sort | Tobias Chaloun |
| collection | DOAJ |
| description | A novel design methodology is presented to mitigate scan blindness in cavity antenna arrays without the need for any changes on the radiating structure itself. For a first proof-of-concept demonstration, a fully PCB-compliant dual-polarized cavity element is loaded by vertical stubs to manipulate the dispersion characteristics in the aperture plane. In contrast with its conventional cavity antenna counterpart, the proposed stub-loaded unit cell element shows through scattering and eigenmode analysis that the vertical stubs may effectively enhance the antenna’s wide-angle scan performance by preventing the onset of surface and leaky wave resonances. Owing to this additional design freedom, an element gain improvement of at least 1 dB is achieved, due to a truly TE and TM mode-free characteristic along the lateral directions. A dual-polarized 11<inline-formula> <tex-math notation="LaTeX">$\times$ </tex-math></inline-formula>11 array prototype was implemented. The measurement results are in very good agreement with those obtained by full-wave simulations. The realized stub-loaded cavity element exhibits reflection coefficients lower than −10 dB with a very low inter-port coupling <−40 dB across the frequency range from 26.8 GHz to 32.7 GHz. Moreover, the co-polarized embedded elements are close to the ideal cos(<inline-formula> <tex-math notation="LaTeX">$\vartheta$ </tex-math></inline-formula>)-pattern for 60° E- and H-plane scans from 28 GHz to 31.5 GHz without oversampling the aperture. |
| first_indexed | 2024-04-13T03:33:42Z |
| format | Article |
| id | doaj.art-581b837f419448c792d37c6ab5623f2c |
| institution | Directory Open Access Journal |
| issn | 2637-6431 |
| language | English |
| last_indexed | 2024-04-13T03:33:42Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of Antennas and Propagation |
| spelling | doaj.art-581b837f419448c792d37c6ab5623f2c2022-12-22T03:04:24ZengIEEEIEEE Open Journal of Antennas and Propagation2637-64312022-01-01378379710.1109/OJAP.2022.31902199826839Design and Analysis of a Novel Wide-Angle Scanning Stub-Loaded Cavity Array ElementTobias Chaloun0https://orcid.org/0000-0002-8945-3270Patrik Gruner1https://orcid.org/0000-0002-3567-5038Wolfgang Menzel2https://orcid.org/0000-0002-9698-7545Institute of Microwave Engineering, University of Ulm, Ulm, GermanyHensoldt Sensors GmbH, Ulm, GermanyInstitute of Microwave Engineering, University of Ulm, Ulm, GermanyA novel design methodology is presented to mitigate scan blindness in cavity antenna arrays without the need for any changes on the radiating structure itself. For a first proof-of-concept demonstration, a fully PCB-compliant dual-polarized cavity element is loaded by vertical stubs to manipulate the dispersion characteristics in the aperture plane. In contrast with its conventional cavity antenna counterpart, the proposed stub-loaded unit cell element shows through scattering and eigenmode analysis that the vertical stubs may effectively enhance the antenna’s wide-angle scan performance by preventing the onset of surface and leaky wave resonances. Owing to this additional design freedom, an element gain improvement of at least 1 dB is achieved, due to a truly TE and TM mode-free characteristic along the lateral directions. A dual-polarized 11<inline-formula> <tex-math notation="LaTeX">$\times$ </tex-math></inline-formula>11 array prototype was implemented. The measurement results are in very good agreement with those obtained by full-wave simulations. The realized stub-loaded cavity element exhibits reflection coefficients lower than −10 dB with a very low inter-port coupling <−40 dB across the frequency range from 26.8 GHz to 32.7 GHz. Moreover, the co-polarized embedded elements are close to the ideal cos(<inline-formula> <tex-math notation="LaTeX">$\vartheta$ </tex-math></inline-formula>)-pattern for 60° E- and H-plane scans from 28 GHz to 31.5 GHz without oversampling the aperture.https://ieeexplore.ieee.org/document/9826839/Planar phased arraysdual-polarized cavity antennascan blindnessSatCom on the move |
| spellingShingle | Tobias Chaloun Patrik Gruner Wolfgang Menzel Design and Analysis of a Novel Wide-Angle Scanning Stub-Loaded Cavity Array Element IEEE Open Journal of Antennas and Propagation Planar phased arrays dual-polarized cavity antenna scan blindness SatCom on the move |
| title | Design and Analysis of a Novel Wide-Angle Scanning Stub-Loaded Cavity Array Element |
| title_full | Design and Analysis of a Novel Wide-Angle Scanning Stub-Loaded Cavity Array Element |
| title_fullStr | Design and Analysis of a Novel Wide-Angle Scanning Stub-Loaded Cavity Array Element |
| title_full_unstemmed | Design and Analysis of a Novel Wide-Angle Scanning Stub-Loaded Cavity Array Element |
| title_short | Design and Analysis of a Novel Wide-Angle Scanning Stub-Loaded Cavity Array Element |
| title_sort | design and analysis of a novel wide angle scanning stub loaded cavity array element |
| topic | Planar phased arrays dual-polarized cavity antenna scan blindness SatCom on the move |
| url | https://ieeexplore.ieee.org/document/9826839/ |
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