Beam Shaping of a Dual-Reflector Antenna Using a Reflectarray as Subreflector and Embedded Unit Cell Patterns
This work proposes a phase-only synthesis technique for shaping the beam of a circularly polarized dual-reflector antenna with a subreflector consisting of a reflectarray and a main parabolic reflector. The proposed technique exploits the element patterns of each reflectarray unit cell embedded in t...
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| Format: | Article |
| Language: | English |
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IEEE
2025-01-01
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| Series: | IEEE Open Journal of Antennas and Propagation |
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| Online Access: | https://ieeexplore.ieee.org/document/10711861/ |
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| author | Marzieh Mehri Dehnavi Jean-Jacques Laurin |
| author_facet | Marzieh Mehri Dehnavi Jean-Jacques Laurin |
| author_sort | Marzieh Mehri Dehnavi |
| collection | DOAJ |
| description | This work proposes a phase-only synthesis technique for shaping the beam of a circularly polarized dual-reflector antenna with a subreflector consisting of a reflectarray and a main parabolic reflector. The proposed technique exploits the element patterns of each reflectarray unit cell embedded in the whole system, including a feed horn, a reflectarray, and a main reflector. By using a penalty function that forces only the fitting of the desired and obtained patterns, the algorithm leads to a quasi-random phase distribution on the reflectarray and a poor radiation pattern. A term for minimizing the Laplacian of the phase distribution is added to the penalty function to force a smoothly varying phase distribution on the reflectarray. This modification provides more stable results and yields patterns with desired shapes and regular contours. The beam shaping capability of the algorithm is demonstrated with simulations of a 100-element reconfigurable circularly polarized reflectarray, by controlling independently the 10 dB beamwidth of the antenna in two orthogonal planes The algorithm is also validated experimentally. Beamwidth accuracies vary from 0 to 2.15 degrees. |
| format | Article |
| id | doaj-art-3ce28ad828d345cc8292470e8c77133c |
| institution | Kabale University |
| issn | 2637-6431 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of Antennas and Propagation |
| spelling | doaj-art-3ce28ad828d345cc8292470e8c77133c2025-01-30T00:03:27ZengIEEEIEEE Open Journal of Antennas and Propagation2637-64312025-01-016113314310.1109/OJAP.2024.347731810711861Beam Shaping of a Dual-Reflector Antenna Using a Reflectarray as Subreflector and Embedded Unit Cell PatternsMarzieh Mehri Dehnavi0Jean-Jacques Laurin1https://orcid.org/0000-0002-5697-7879Department of Electrical Engineering, Polytechnique Montréal, Montreal, QC, CanadaDepartment of Electrical Engineering, Polytechnique Montréal, Montreal, QC, CanadaThis work proposes a phase-only synthesis technique for shaping the beam of a circularly polarized dual-reflector antenna with a subreflector consisting of a reflectarray and a main parabolic reflector. The proposed technique exploits the element patterns of each reflectarray unit cell embedded in the whole system, including a feed horn, a reflectarray, and a main reflector. By using a penalty function that forces only the fitting of the desired and obtained patterns, the algorithm leads to a quasi-random phase distribution on the reflectarray and a poor radiation pattern. A term for minimizing the Laplacian of the phase distribution is added to the penalty function to force a smoothly varying phase distribution on the reflectarray. This modification provides more stable results and yields patterns with desired shapes and regular contours. The beam shaping capability of the algorithm is demonstrated with simulations of a 100-element reconfigurable circularly polarized reflectarray, by controlling independently the 10 dB beamwidth of the antenna in two orthogonal planes The algorithm is also validated experimentally. Beamwidth accuracies vary from 0 to 2.15 degrees.https://ieeexplore.ieee.org/document/10711861/Dual-reflector antennareconfigurable sub-reflectarraybeam shapingbeam synthesisparticle swarm optimizationcircular polarization |
| spellingShingle | Marzieh Mehri Dehnavi Jean-Jacques Laurin Beam Shaping of a Dual-Reflector Antenna Using a Reflectarray as Subreflector and Embedded Unit Cell Patterns IEEE Open Journal of Antennas and Propagation Dual-reflector antenna reconfigurable sub-reflectarray beam shaping beam synthesis particle swarm optimization circular polarization |
| title | Beam Shaping of a Dual-Reflector Antenna Using a Reflectarray as Subreflector and Embedded Unit Cell Patterns |
| title_full | Beam Shaping of a Dual-Reflector Antenna Using a Reflectarray as Subreflector and Embedded Unit Cell Patterns |
| title_fullStr | Beam Shaping of a Dual-Reflector Antenna Using a Reflectarray as Subreflector and Embedded Unit Cell Patterns |
| title_full_unstemmed | Beam Shaping of a Dual-Reflector Antenna Using a Reflectarray as Subreflector and Embedded Unit Cell Patterns |
| title_short | Beam Shaping of a Dual-Reflector Antenna Using a Reflectarray as Subreflector and Embedded Unit Cell Patterns |
| title_sort | beam shaping of a dual reflector antenna using a reflectarray as subreflector and embedded unit cell patterns |
| topic | Dual-reflector antenna reconfigurable sub-reflectarray beam shaping beam synthesis particle swarm optimization circular polarization |
| url | https://ieeexplore.ieee.org/document/10711861/ |
| work_keys_str_mv | AT marziehmehridehnavi beamshapingofadualreflectorantennausingareflectarrayassubreflectorandembeddedunitcellpatterns AT jeanjacqueslaurin beamshapingofadualreflectorantennausingareflectarrayassubreflectorandembeddedunitcellpatterns |