Title :
Multilayer offset Fresnel zone plate reflector
Author :
Guo, Y.J. ; Sassi, I.H. ; Barton, S.K.
Author_Institution :
Dept. of Electr. & Electron. Eng., Bradford Univ., UK
fDate :
6/1/1994 12:00:00 AM
Abstract :
An offset phase-correcting Fresnel zone plate (FZP) reflector antenna based on the multilayer configuration is presented. The reflector consists of a conducting ground and four layers of conducting patterns separated by four dielectric substrates. An experimental prototype designed at 10.39 GHz was fabricated and tested. With a 0.32 m by 0.34 m elliptical reflector aperture and a pyramidal feedhorn, the antenna achieved -20-dB sidelobe level and 61% maximum efficiency. Compared with a phase reversal FZP of the same size, a 3.3-dB gain improvement and significant sidelobe reduction were obtained.<>
Keywords :
antenna feeders; antenna radiation patterns; microwave antennas; reflector antennas; 0.32 m; 0.34 m; 10.39 GHz; 3.3 dB; 61 percent; SHF; conducting ground; conducting patterns; dielectric substrates; elliptical reflector; multilayer configuration; offset Fresnel zone plate reflector; phase-correcting zone plate; pyramidal feedhorn; reflector antenna; sidelobe reduction; Antenna feeds; Aperture antennas; Costs; Dielectric substrates; Fresnel reflection; Nonhomogeneous media; Optical surface waves; Prototypes; Reflector antennas; Testing;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
