Title :
Efficiency enhancement of radial line slot antennas by reducing termination loss
Author :
Takahashi, M. ; Takada, J. ; Ando, M. ; Goto, N.
Author_Institution :
Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Japan
Abstract :
The efficiency of single-layered radial line slot antennas has been enhanced by adopting nonuniform aperture illumination, which reduces the termination loss. An efficiency enhancement of 5-10% is observed. A measured gain of 36.7 dBi (87%) and 32.9 dBi (81%) and an axial ratio around 1 dB for 0.6-m phi and 0.4-m phi antennas, respectively, verify this technique.<>
Keywords :
slot antennas; 0.4 m; 0.6 m; 81 percent; 87 percent; axial ratio; efficiency enhancement; gain; nonuniform aperture illumination; single-layered radial line slot antennas; termination loss reduction; Antenna measurements; Apertures; Arrayed waveguide gratings; Gain measurement; Lighting; Planar arrays; Planar waveguides; Satellite broadcasting; Slot antennas; Spirals;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1992. AP-S. 1992 Digest. Held in Conjuction with: URSI Radio Science Meeting and Nuclear EMP Meeting., IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-0730-5
DOI :
10.1109/APS.1992.222012
