Title :
Quarter-wave Fresnel zone planar lens and antenna
Author :
Hristov, H.D. ; Herben, M.H.A.J.
Author_Institution :
Dept. of Radiotechnics, Tech. Univ. of Varna, Bulgaria
fDate :
8/1/1995 12:00:00 AM
Abstract :
A new variety of the Fresnel zone planar lens with enhanced focusing quality is proposed. Each full-wave zone is divided into four quarter-wave subzones, which are covered by dielectric rings having equal thickness but different permittivities. Based on this planar lens configuration, a transmissive-type Fresnel-zone antenna for DBS-reception with more than 50% aperture efficiency is developed and examined theoretically
Keywords :
Fresnel diffraction; aperture antennas; direct broadcasting by satellite; focusing; lens antennas; permittivity; receiving antennas; DBS-reception; aperture efficiency; dielectric rings; focusing quality; permittivity; planar lens configuration; quarter-wave Fresnel zone planar lens; transmissive-type Fresnel-zone antenna; Antenna theory; Aperture antennas; Dielectrics; Focusing; Fresnel reflection; Lenses; Microwave antennas; Permittivity; Reflector antennas; Transmitting antennas;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
