Title :
Performance characteristics of phase-correcting Fresnel zone plates
Author :
Garrett, J.E. ; Wiltse, J.C.
Author_Institution :
Georgia Tech. Res. Inst., Atlanta, GA, USA
Abstract :
Specific measured and/or theoretical characteristics are given for phase-correcting zone plate antennas. Parameters described include off-axis performance, axial intensity dependence, efficiency, distortion and aberrations, and bandwidth. Measured data are summarized for 10, 94, and 140 GHz. This type of zone plate has the advantages (compared to a lens) of reduced loss, weight, volume, cost, and planar construction, with similar diffraction-limited beamwidth and major-sidelobe performance, but lower efficiency.<>
Keywords :
antenna radiation patterns; antenna theory; lens antennas; microwave antennas; Fresnel zone plates; aberrations; antennas; axial intensity dependence; bandwidth; directive antennas; distortion; efficiency; far field pattern; off-axis performance; phase-correcting; Antenna measurements; Antenna theory; Bandwidth; Costs; Diffraction; Distortion measurement; Fresnel reflection; Lenses; Performance loss; Phase measurement;
Conference_Titel :
Microwave Symposium Digest, 1990., IEEE MTT-S International
Conference_Location :
Dallas, TX
DOI :
10.1109/MWSYM.1990.99700
