期刊
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
卷 16, 期 -, 页码 912-915出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2016.2614498
关键词
Electromagnetic band-gap (EBG); electromagnetic band-gap resonator antenna (ERA); Fabry-Perot resonator antenna (FPRA); high gain; near-field phase transformation; particle swarm optimization (PSO); propagation time; time-delay equalizer metasurface (TDEM)
This letter presents an efficient particle swarm optimization (PSO) algorithm developed to design a near-field time-delay equalizer metasurface (TDEM) for the purpose of improving directivity and radiation patterns of classical electromagnetic band-gap resonator antennas. Triple layers of conductive printed patterns in the metasurface were optimized by the PSO algorithm to systematically design the TDEM. Predicted and measured results show a significant improvement in antenna performance including 9.6 dB enhancement in antenna directivity, lower sidelobes, and higher gain. The measured directivity of the prototype is 21 dBi, and 3-dB bandwidth is 11.8%.
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