Title :
Omnidirectional circularly polarized antenna based on meta material transmission line
Author :
Park, Byung-Chul ; Lee, Jeong-Hae
Author_Institution :
Dept. of Electron. Inf. & Commun. Eng., Hongik Univ., Seoul, South Korea
Abstract :
The omnidirectional CP antenna at 1.5 GHz is presented using an arc-shaped mushroom structure with curved branches. To obtain the omnidirectional pattern and vertical polarization, the antenna utilizes the ZOR mode of an arc-shaped mushroom structure. The horizontal polarization is achieved by the curved branch attached to each mushroom. The proposed antenna is simply designed with a single feed. The simulated axial ratio is 0.31-3.22 dB. The measured gain of -9.56-2.28 dBic is obtained in the azimuthal plane.
Keywords :
UHF antennas; antenna feeds; antenna radiation patterns; directive antennas; electromagnetic wave polarisation; metamaterials; transmission lines; antenna feed; antenna radiation pattern; arc-shaped mushroom structure; axial ratio; azimuthal plane; curved branches; frequency 1.5 GHz; gain -9.56 dB to 2.28 dB; horizontal polarization; meta material transmission line; omnidirectional circularly polarized antenna; vertical polarization; zeroth order resonance mode; Antenna feeds; Antenna measurements; Antenna radiation patterns; Azimuthal plane; Delay lines; Frequency; Mobile antennas; Polarization; Satellite antennas; Transmission line antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2009. APSURSI '09. IEEE
Conference_Location :
Charleston, SC
Print_ISBN :
978-1-4244-3647-7
DOI :
10.1109/APS.2009.5172112
