High Efficiency Flat Array Antennas for DBS Reception

A radial line slot antenna (RLSA) is a high efficiency planar array. A uniform aperture illumination for single-layred one is realized by varying slot lengths and spacings over the aperture. This paper presents the measured performance of the high efficiency SL-RLSA's. The efficiency of 70%~84% is observed for SL-RLSA's with the diameters of 0.25m~0.60m. Two novel techniques are also proposed for further improvement.

[1]  J. Hirokawa,et al.  A matching slot pair for a circularly-polarized slotted waveguide array , 1990, International Symposium on Antennas and Propagation Society, Merging Technologies for the 90's.

[2]  M. Ando,et al.  Characteristics of a radial line slot antenna for 12 GHz band satellite TV reception , 1986 .

[3]  Makoto Ando,et al.  A matching slot pair for a circularly-polarized slotted waveguide array , 1990 .

[4]  J. Takada,et al.  A slot design for uniform aperture field distribution in single-layered radial line slot antennas , 1990, International Symposium on Antennas and Propagation Society, Merging Technologies for the 90's.