Open AccessHigh‐efficiency circularly polarised leaky‐wave antenna fed by spoof surface plasmon polaritons
Author(s) -
Zhang QingLe,
Zhang Qingfeng,
Chen Yifan
Publication year - 2018
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.2017.1054
Subject(s) - optics , surface plasmon polariton , physics , leaky wave antenna , bandwidth (computing) , antenna (radio) , surface wave , plasmon , surface plasmon , materials science , microstrip antenna , telecommunications , engineering
A circularly polarised (CP) periodic leaky‐wave antenna excited by spoof surface plasmon polaritons (SPPs) is proposed. It is based on an SPP transmission line loaded by periodic rectangular patches on both sides with 90 ∘ phase shift, which converts the SPPs mode to CP propagating waves in the air. Due to the dispersion nature of SPPs waveguide, this leaky‐wave antenna exhibits a beam scanning feature. Both simulated and measured results demonstrate that the proposed antenna has an impedance bandwidth of 33% for | S 11 | < − 10dB and a 3 dB axial ratio bandwidth of 15%. The average gain and radiation efficiency are about 10 dBic and 87% from 5.5 to 6.4 GHz, respectively.