Open AccessLow‐profile circularly polarised patch antenna with high gain and conical beam
Author(s) -
Xu Hengfei,
Zhou Jianyi,
Zhou Ke,
Yu Zhiqiang
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.2017.0928
Subject(s) - optics , radiation pattern , patch antenna , ground plane , conical surface , microstrip antenna , bandwidth (computing) , radiation , axial ratio , materials science , antenna gain , antenna aperture , antenna (radio) , physics , microstrip , circular polarization , electrical engineering , engineering , telecommunications , composite material
A low‐profile circularly polarised (CP) antenna with conical‐beam radiation pattern is presented. The proposed antenna consists of a monopolar patch antenna fed by a probe in the centre and a ring‐shaped array formed by eight modified parasitic patch elements. Two resonant modes of the monopolar patch which connects to a ground plane by a set of conductive shorting vias are utilised to achieve wide impedance bandwidth. A CP conical‐beam radiation pattern is formed by loading the designed array. Loop current and slot resonant mode are employed to discuss the operating principle. A parametric study is carried out for the detailed design concept illustration. To verify the design, a prototype has been fabricated and measured, which shows a low profile of 0.059 λ 0 , a maximum gain of 7.45 dBic, a 10‐dB impedance bandwidth of 23.1%, a 3‐dB axial ratio bandwidth of 9.6% and a good conical‐beam radiation pattern.