AMC surface based on spiral strips and its applications for low‐profile broadband planar antennas | Zendy

Li RongLin | Zendy; Qin Yue | Zendy; Li Fuyun | Zendy; Wu Linjuan | Zendy; Cui Yuehui | Zendy

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AMC surface based on spiral strips and its applications for low‐profile broadband planar antennas

Author(s) -

Li RongLin,

Qin Yue,

Li Fuyun,

Wu Linjuan,

Cui Yuehui

Publication year - 2019

Publication title -

iet microwaves, antennas and propagation

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.555

H-Index - 69

eISSN - 1751-8733

pISSN - 1751-8725

DOI - 10.1049/iet-map.2018.5489

Subject(s) - strips , planar , broadband , spiral (railway) , materials science , surface (topology) , optics , acoustics , electronic engineering , engineering , computer science , physics , geometry , mathematics , mechanical engineering , composite material , computer graphics (images)

A novel artificial magnetic conductor (AMC) surface based on spiral strips is proposed, which consists of 9 × 9 AMC cells. Each AMC cell includes a spiral strip to increase its inductance, thus featuring a wide bandwidth of 42% for ±90° reflection phase. The AMC surface is applied to three planar dipole antennas for lowering the antenna heights, including a linearly polarised (LP) antenna, a dual‐polarised (DP) antenna, and a circularly polarised (CP) antenna. It is shown by simulation and experiment that the LP antenna achieves an impedance bandwidth of 40% (0.68–1.02 GHz) for | S 11 | < −15 dB and a gain of 8 dBi, the DP antenna realises an impedance bandwidth of 33% (0.69–0.96 GHz) for | S 11 | < −15 dB, an isolation of 30 dB, and a gain of 8 dBi, and the CP antenna has an overlapped bandwidth of 33% (0.75–1.05 GHz) for | S 11 | < −15 dB and axial ratio <3 dB. The heights of all the three planar antennas are lowered from 0.265–0.3 λ 0 to 0.083 λ 0 .

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