A Low Sidelobe Dual-Beam Sparse Reflectarray Antenna with Combination of Transmissive and Reflective Elements.

Saved in:

Bibliographic Details
Title:	A Low Sidelobe Dual-Beam Sparse Reflectarray Antenna with Combination of Transmissive and Reflective Elements.
Authors:	Luo, Wei¹, Xie, Mingli¹ 2524009817@qq.com, Luo, Liu¹, Yang, Yuqi²
Source:	Progress in Electromagnetics Research C. 2026, Vol. 166, p89-96. 8p.
Subjects:	Reflectarray antennas, Genetic algorithms, Reflective materials, Antennas (Electronics), Radar
Abstract:	A low side-lobe dual-beam reflectarray antenna is proposed based on the sparse array principle. The reflected dual beams achieve high gain through optimized phase compensation, in which the transmissive elements act as dummy elements to suppress side lobes. A global search optimization technique based on genetic algorithm (GA) is adopted to improve the arrangement of transmissive and reflection elements. Since all the reflective and transmissive elements operating in the same wide frequency band are non-uniformly distributed on the aperture, both the backward radiation and cross polarization levels are effectively suppressed. The measurement results show that the side-lobe level of the dual-beams is less than -19 dB. The peak gain and peak aperture efficiency of the designed antenna are 26.0 dBi and 38.9%, respectively. The 3-dB gain bandwidth is 13.8%. The front to back ratio at 30 GHz is 27 dB. This dual-beam antenna has the advantages of high gain, low side lobes, and wide beam radiation range, which make it suitable for millimeter-wave multi-target radar detection systems. [ABSTRACT FROM AUTHOR]
	Copyright of Progress in Electromagnetics Research C is the property of Electromagnetics Academy and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database:	Engineering Source

Description
Abstract:	A low side-lobe dual-beam reflectarray antenna is proposed based on the sparse array principle. The reflected dual beams achieve high gain through optimized phase compensation, in which the transmissive elements act as dummy elements to suppress side lobes. A global search optimization technique based on genetic algorithm (GA) is adopted to improve the arrangement of transmissive and reflection elements. Since all the reflective and transmissive elements operating in the same wide frequency band are non-uniformly distributed on the aperture, both the backward radiation and cross polarization levels are effectively suppressed. The measurement results show that the side-lobe level of the dual-beams is less than -19 dB. The peak gain and peak aperture efficiency of the designed antenna are 26.0 dBi and 38.9%, respectively. The 3-dB gain bandwidth is 13.8%. The front to back ratio at 30 GHz is 27 dB. This dual-beam antenna has the advantages of high gain, low side lobes, and wide beam radiation range, which make it suitable for millimeter-wave multi-target radar detection systems. [ABSTRACT FROM AUTHOR]
ISSN:	19378718
DOI:	10.2528/PIERC25120405