Title :
A wideband dual-fed circularly polarized antenna
Author :
Mingjian Li ; Kwai-Man Luk
Author_Institution :
Electron. Eng., City Univ. of Hong Kong, Hong Kong, China
Abstract :
A wideband circularly polarized antenna based on dual-polarized magneto-electric dipole antenna is proposed. After connected to a broadband 90° phase shifter and a Wilkinson power divider, the proposed dual-polarized antenna achieves circularly polarized (CP) radiation. This CP antenna exhibits a wide impedance bandwidth of 89.7% from 1.23 - 3.23 GHz with SWR ≤ 2 which covers the whole 3-dB axial-ratio (AR) bandwidth of 82% from 1.28 - 3.05 GHz. In this operation frequency band, the proposed antenna has a broadside gain of larger than 5 dBi above 1.45 GHz. Considering the common overlapped bandwidth limited by the impedance, AR and gain, the proposed antenna exhibits an effective bandwidth of 71%.
Keywords :
antenna radiation patterns; broadband antennas; dipole antennas; power dividers; Wilkinson power divider; bandwidth 1.23 GHz to 3.23 GHz; bandwidth 1.28 GHz to 3.05 GHz; circularly polarized radiation; dual-polarized magneto-electric dipole antenna; phase shifter; wideband dual-fed circularly polarized antenna; Abstracts; Bandwidth; Dipole antennas; Magnetic separation; Magnetoelectric effects; Probes;
Conference_Titel :
Electromagnetics (iWEM), 2013 IEEE International Workshop on
Conference_Location :
Kowloon
Print_ISBN :
978-1-4799-6654-7
DOI :
10.1109/iWEM.2013.6888785
