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An axial‐ratio beam‐width enhancement of patch‐slot antenna based on EBG
Author(s) -
Ke Wang Zhao,
Yuan Bo,
Zhang Xiao Hong,
Luo Guo Qing
Publication year - 2017
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30328
Subject(s) - axial ratio , optics , materials science , patch antenna , microstrip antenna , beam diameter , slot antenna , optoelectronics , antenna (radio) , physics , electrical engineering , circular polarization , microstrip , engineering , laser beams , laser
A low‐profile axial‐ratio beam‐width enhancement of patch‐slot antenna based on electromagnetic band gap (EBG) structure is proposed. To achieve the circularly polarized property, a diagonal slot is etched in the center of the radiation patch. The traditional mushroom‐like EBG unit cells around the patch are used to suppress the surface wave and improve the front to back ratio. This proposed antenna is printed on the FR4 substrate and fed by a single, conventional coaxial cable with 50 Ω impedance. Measured results show that the impedance bandwidth and 3‐dB axial ratio bandwidth of proposed antenna are 128 and 30 MHz, respectively. By using EBG unit cells, the 3‐dB AR beam‐width can be extended to 232.5° at x–z plane and 258° at y–z plane. The front to back ratio of the antenna is also improved to 25 dB. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:493–497, 2017