Open AccessSingle‐fed broadband circularly polarised dipole antenna with simple structure
Author(s) -
Xue HaiGao,
Yang XueXia,
Ma Zhewang,
Wang Yan
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2016.4086
Subject(s) - dipole antenna , physics , optics , dipole , axial ratio , magnetic dipole , turnstile antenna , circular polarization , monopole antenna , radiation pattern , broadband , antenna (radio) , coaxial antenna , telecommunications , microstrip , engineering , quantum mechanics
A new designed single‐fed broadband circularly polarised dipole antenna with simple structure is presented. The antenna is composed of a horizontal electric dipole and an equivalent magnetic dipole realised by two vertical patches quarter‐wave shorted at the bottom. The electric dipole and equivalent magnetic dipole are positioned along the same axis to excite the orthogonal radiation fields with the same amplitude and 90° phase difference for circular polarisation. A broad impedance bandwidth of 69% (| S 11 | < −10 dB) from 1.6 to 3.2 GHz is achieved, which covers the whole 3 dB axial ratio bandwidth of 42.7% from 2.0 to 3.1 GHz. In this operation frequency band, the measured gain is above 6.4 dBi and the peak value is 8.4 dBi.