Title :
High efficiency cavity-backed log-periodic antenna
Author :
Jaegeun Ha ; Filipovic, Dejan S.
Author_Institution :
Dept. of Electr., Comput., & Energy Eng., Univ. of Colorado Boulder, Boulder, CO, USA
Abstract :
High efficiency uni-directional log-periodic antenna with low-profile cavity-backing is presented. The proposed concept offers a novel approach for transforming a broadband bi-directional aperture to a uni-directional antenna. To eliminate lossy materials inside the cavity, a parasitic cross bow-tie slot with controlled coupling and dissipation is introduced at the bottom of the cavity. The numerical and experimental results show VSWR <; 3:1, gain > 1.5dBi and average efficiency of 82% from 0.55GHz to 6GHz.
Keywords :
directive antennas; log periodic antennas; numerical analysis; slot antennas; VSWR; broadband bi-directional aperture; dissipation; frequency 0.55 GHz to 6 GHz; high efficiency cavity-backed log-periodic antenna; lossy materials; low-profile cavity-backing; parasitic cross bow-tie slot; unidirectional antenna; Antenna radiation patterns; Bandwidth; Broadband antennas; Cavity resonators; Couplings; Lenses;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2014 IEEE
Conference_Location :
Memphis, TN
Print_ISBN :
978-1-4799-3538-3
DOI :
10.1109/APS.2014.6904985
