Journal ArticleDOI
Multilayer offset Fresnel zone plate reflector
Y.J. Guo,I.H. Sassi,S.K. Barton +2 more
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TLDR
In this article, an offset phase-correcting Fresnel zone plate (FZP) reflector antenna based on the multilayer configuration was presented, which achieved -20dB sidelobe level and 61% maximum efficiency.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. >read more
Citations
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Fresnal Zones in Wireless Links, Zone Plate Lenses and Antennas
TL;DR: In this article, the authors present a comprehensive survey of the application of Fresnel zones in microwave/mm-wave electromagnetics, including the theory, design and practical applications.
Journal ArticleDOI
W-Band Fresnel Zone Plate Reflector for Helicopter Collision Avoidance Radar
TL;DR: In this article, a high gain Fresnel zone plate reflector is presented for helicopter collision avoidance radar at 94 GHz, which consists of a compact, airtightness and low return loss primary source illuminating a printed reflector with Fresnel plate zone phase correction.
Journal ArticleDOI
Electromagnetic analysis of beam-scanning antenna at millimeter-wave band based on photoconductivity using Fresnel-zone-plate technique
TL;DR: In this paper, a Fresnel-zone-plate antenna (FZPA) was proposed for the Ka band that scans the beam of a millimeter wave source using a pulse laser.
Journal ArticleDOI
Reconfigurable Fresnel-Zone-Plate-Shutter Antenna with Beam-Steering Capability
TL;DR: In this paper, a reconfigurable Fresnel-zone-plate (FZP) antenna, capable of dynamic beam scanning, is introduced, which consists of a series of thin metal shutters, which discretize the antenna aperture into a number of transparent and opaque zones.
Journal ArticleDOI
Metal-only Fresnel zone plate antenna for millimetre-wave frequency bands
TL;DR: In this paper, a metal-only Fresnel zone plate antenna (FZPA) was proposed to operate at millimetre wave frequency bands with a gain of 44.29 dBi and an aperture efficiency of 48.42%.
References
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Journal ArticleDOI
Millimeter-Wave Characteristics of Phase-Correcting Fresnel Zone Plates
D.N. Black,J.C. Wiltse +1 more
TL;DR: In this article, a phase-correcting Fresnel zone plate is described, and its characteristics are given when used in the millimeter-wave region for imaging or frequency filtering in place of a lens.
Journal ArticleDOI
Flat printed reflector antenna for mm-wave applications
TL;DR: An antenna consisting of a flat printed reflector and a feed horn was investigated at mm-wave frequencies in this paper, where the dielectric material is fully metal covered at the side opposite to the feed, whereas the side facing the feed is provided with a number of metallic annular rings forming a Fresnel zone plate.
Journal ArticleDOI
A millimeter-wave integrated-circuit antenna based on the Fresnel zone plate
M.A. Gouker,G.S. Smith +1 more
TL;DR: In this article, a new type of millimeter-wave integrated-circuit antenna based on a quasi-optical design is investigated, which consists of a Fresnel zone plate on one side of a dielectric substrate and a resonant strip dipole antenna at the focus of the zone plate.
Journal ArticleDOI
A millimeter-wave integrated-circuit antenna based on the Fresnel zone plate
M.A. Gouker,G.S. Smith +1 more
TL;DR: In this paper, the effect of adding the reflector behind the zone plate to increase the gain of the antenna was investigated, and it was found that even without the reflection, the gain was increased because of the 180 degrees phase difference between the reflection off the metal rings and the open rings.
Journal ArticleDOI
A high-efficiency quarter-wave zone plate reflector
Y.J. Guo,S.K. Barton +1 more
TL;DR: In this paper, a multilayered quarter-wave zone plate reflector antenna operating in the microwave range is presented, and the theory for designing the reflector and experimental results are given.