Open AccessTri‐band planar monopole antenna with two circularly polarised bandwidths for WiMAX applications
Author(s) -
Gyasi Kwame Oteng,
Wen Guangjun,
Inserra Daniele,
Huang Yongjun,
Ampoma Emmanuel Affum,
Li Jian,
Basit Muhammad Abdul,
Zhang Hao Bin
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.2018.5323
Subject(s) - monopole antenna , physics , ground plane , optics , axial ratio , wimax , planar , bandwidth (computing) , antenna (radio) , radiation pattern , dipole antenna , circular polarization , telecommunications , microstrip , engineering , computer science , wireless , computer graphics (images)
A tri‐band planar monopole antenna with one linearly polarised band, two circularly polarised bands, and bidirectional radiation patterns is presented in this study. The antenna consists of a monopole with seven arms etched on the top side of a FR4 substrate, and a slitted ground plane on the bottom side. Measured results show that the antenna has a S 11 <−10 dB impedance bandwidth of 9.7% (2.05–2.26 GHz) for the lower band, 11.3% (3.41–3.82 GHz) for the middle band, and 60.2% (4.89–9.11 GHz) for the upper band. The circular polarisation (CP) is radiated within the middle (left hand CP) and the upper (right hand CP) bands, and the measured broadside 3 dB axial ratio bandwidths are 4.9% (3.53–3.71 GHz) and 58.6% GHz (4.69–8.58 GHz), respectively. The proposed antenna has a total size of 25 × 35 × 1.6 mm 3 and can be employed for the 2.1 GHz UMTS, whereas the CP bands can be used for the 3.5/5.5 GHz WiMAX, 5.5 GHz Wi‐Fi, and 5.2/5.8 GHz WLAN applications.