Title :
Phase correcting zonal reflector incorporating rings
Author :
Guo, Y. Jay ; Barton, Stephen K.
Author_Institution :
Dept. of Electron. & Electr. Eng., Bradford Univ., UK
fDate :
4/1/1995 12:00:00 AM
Abstract :
An array of conducting elements printed on a grounded dielectric substrate functions as an electromagnetic phase shifter. With a fixed substrate and a given operating frequency, the phase shift is determined by the array parameters. In the paper, the spectral domain moment method model for analyzing homogeneous reflective phase shifters with conducting rings as elements is presented, and numerical and experimental results are given. A novel phase correcting Fresnel zonal reflector based on this model is reported. A 43% maximum antenna efficiency and -22 dB sidelobe level were measured in X-band. The bandwidth of the reflector is estimated to be greater than 10%
Keywords :
direct broadcasting by satellite; method of moments; microwave phase shifters; receiving antennas; reflector antennas; satellite antennas; zone plates; 43 percent; DBS reception; Fresnel zoneplate reflector; X-band; antenna efficiency; array parameters; bandwidth; conducting elements; conducting rings; electromagnetic phase shifter; experimental results; grounded dielectric substrate; homogeneous reflective phase shifters; moment method model; numerical results; operating frequency; phase correcting Fresnel zonal reflector; phase shift; receive-only VSAT; sidelobe level; spectral domain; Antenna measurements; Apertures; Bandwidth; Dielectric substrates; Dipole antennas; Frequency; Moment methods; Phase shifters; Phased arrays; Reflector antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
