Title :
Gain optimization in RLSAs with lossy substrates by the slot coupling control
Author :
Tung Nguyen ; Hirokawa, Jiro ; Ando, Makoto ; Castaner, Manuel Sierra
Author_Institution :
Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Tokyo, Japan
Abstract :
This paper studies the operation of Radial Line Slot Antennas (RLSAs) having lossy substrates as waveguide-filled materials. Based on the operating mechanism of the conventional lossless RLSAs, new formulations to optimize the antenna gain are derived theoretically and partly confirm by measurement. As the result, at 32GHz, a 90cm diameter RLSA with material loss factor of 0.014~0.018dB/mm, about 0.25~0.35dBi gain enhancement is expected by using newly defined coupling.
Keywords :
losses; millimetre wave antennas; optimisation; slot antennas; slot lines; substrates; waveguide antennas; antenna gain optimization; frequency 32 GHz; lossless RLSA; lossy substrates; material loss factor; operating mechanism; radial line slot antennas; size 90 cm; slot coupling control; waveguide-filled materials; Apertures; Couplings; Dielectric losses; Gain; Slot antennas; coupling factor; lossy substrate; radial line slot antenna;
Conference_Titel :
Antennas and Propagation (EuCAP), 2014 8th European Conference on
Conference_Location :
The Hague
DOI :
10.1109/EuCAP.2014.6902054
