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Compact Electromagnetic Lens Antennas Using Cascaded Metasurfaces for Gain Enhancement and Beam Steering Applications
Abstract
Electromagnetic (EM) lens antenna designs using cascaded metasurfaces for gain enhancement and beam steering applications are proposed. Two different lens aperture designs are proposed and populated with aperiodic unit cells of size 0.2λo × 0.2λo. In lens Design 1, the unit cells of different phases are distributed in concentric circular zones, whereas in lens Design 2, the unit cells of different phases are distributed in vertical linear zones on the aperture of the EM lens. Both lenses are composed of two cascaded metasurfaces with an air gap of 0.047λo (where λo = 51.7 mm at 5.8 GHz). For gain enhancement, the metasurfaces are positioned at an optimum focal distance, f = 0.61λo above source patch antenna (f/D = 0.3). Beam steering is accomplished by phase transformation of the source antenna, which can be realized by mechanically sliding the passive metasurfaces in one direction (i.e., ±x-direction) above the source antenna. The prototype of the two proposed lenses are fabricated and tested. The measured peak boresight gain obtained from Design 1 and 2 are 14.98 dBi and 15.12 dBi, respectively. The experimental results show -25o to +25o and -27o to +27o beam steering range for Design 1 and 2, respectively, with a little gain degradation at other angles.
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Authors (5)
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Rao Aziz
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Amit Singh
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Jun-Sung Park
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Seong-Ook Park
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING
no. 32,
ISSN: 1096-4290 - Language:
- English
- Publication year:
- 2022
- Bibliographic description:
- Aziz R., Singh A., Park J., Park S., Kozieł S.: Compact Electromagnetic Lens Antennas Using Cascaded Metasurfaces for Gain Enhancement and Beam Steering Applications// INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING -Vol. 32,iss. 11 (2022), s.e23327-
- DOI:
- Digital Object Identifier (open in new tab) 10.1002/mmce.23327
- Sources of funding:
-
- Free publication
- Verified by:
- Gdańsk University of Technology
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