Wide-Angle Beam-Scanning Reflectarray With Mechanical Steering
A novel wide-angle beam-scanning phase synthesis method, namely, multibeam phase matching method is introduced in this paper. It takes full advantage of angle sensitivity characteristic of reflectarray elements to improve the beam-scanning performance of reflectarrays. In the process of reflectarray...
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Published in | IEEE transactions on antennas and propagation Vol. 66; no. 1; pp. 172 - 181 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
New York
IEEE
01.01.2018
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subjects | |
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Abstract | A novel wide-angle beam-scanning phase synthesis method, namely, multibeam phase matching method is introduced in this paper. It takes full advantage of angle sensitivity characteristic of reflectarray elements to improve the beam-scanning performance of reflectarrays. In the process of reflectarray aperture synthesis, the beam deviation factors and reference phases are optimized to minimize the total phase error, and the geometries of each element are optimized to match the desired phase shifts at multiple beam-scanning angles after taking into account the real incident angles. Then, a <inline-formula> <tex-math notation="LaTeX">16 \times 16 </tex-math></inline-formula>-element reflectarray antenna with square patch elements operating at 12 GHz has been designed, simulated, and fabricated. The measured results show that a gain variation less than 1.7 dB across the scan coverage from −45° to +45° can be achieved by mechanically rotating the feed antenna, which shows a considerable improvement in beam-scanning performance as compared to the reflectarrays designed using conventional single-focus and bifocal methods. |
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AbstractList | A novel wide-angle beam-scanning phase synthesis method, namely, multibeam phase matching method is introduced in this paper. It takes full advantage of angle sensitivity characteristic of reflectarray elements to improve the beam-scanning performance of reflectarrays. In the process of reflectarray aperture synthesis, the beam deviation factors and reference phases are optimized to minimize the total phase error, and the geometries of each element are optimized to match the desired phase shifts at multiple beam-scanning angles after taking into account the real incident angles. Then, a [Formula Omitted]-element reflectarray antenna with square patch elements operating at 12 GHz has been designed, simulated, and fabricated. The measured results show that a gain variation less than 1.7 dB across the scan coverage from −45° to +45° can be achieved by mechanically rotating the feed antenna, which shows a considerable improvement in beam-scanning performance as compared to the reflectarrays designed using conventional single-focus and bifocal methods. A novel wide-angle beam-scanning phase synthesis method, namely, multibeam phase matching method is introduced in this paper. It takes full advantage of angle sensitivity characteristic of reflectarray elements to improve the beam-scanning performance of reflectarrays. In the process of reflectarray aperture synthesis, the beam deviation factors and reference phases are optimized to minimize the total phase error, and the geometries of each element are optimized to match the desired phase shifts at multiple beam-scanning angles after taking into account the real incident angles. Then, a <inline-formula> <tex-math notation="LaTeX">16 \times 16 </tex-math></inline-formula>-element reflectarray antenna with square patch elements operating at 12 GHz has been designed, simulated, and fabricated. The measured results show that a gain variation less than 1.7 dB across the scan coverage from −45° to +45° can be achieved by mechanically rotating the feed antenna, which shows a considerable improvement in beam-scanning performance as compared to the reflectarrays designed using conventional single-focus and bifocal methods. |
Author | Yang, Shiwen Wu, Geng-Bo Qu, Shi-Wei |
Author_xml | – sequence: 1 givenname: Geng-Bo orcidid: 0000-0002-8226-1663 surname: Wu fullname: Wu, Geng-Bo organization: School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, China – sequence: 2 givenname: Shi-Wei orcidid: 0000-0001-6683-9034 surname: Qu fullname: Qu, Shi-Wei email: shiweiqu@uestc.edu.cn organization: School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, China – sequence: 3 givenname: Shiwen orcidid: 0000-0002-1546-8947 surname: Yang fullname: Yang, Shiwen email: swnyang@uestc.edu.cn organization: School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, China |
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SubjectTerms | Angle of reflection Angles (geometry) Antenna feeds Aperture synthesis Apertures beam scan incident angle Manganese Optimization Patch antennas Phase error Phase matching reflectarray Reflection Reflector antennas Scanning Synthesis |
Title | Wide-Angle Beam-Scanning Reflectarray With Mechanical Steering |
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