DocumentCode :
3170059
Title :
A Low-Cost Shaped-Beam Hybrid-Feed Microstrip Planar Array Antenna for X-Band Polarimetric Radar Systems
Author :
Vallecchi, Andrea ; Gentili, Guido Biffi
Author_Institution :
Dept. of Electron. & Telecomm., Florence Univ.
fYear :
2006
fDate :
13-15 Sept. 2006
Firstpage :
124
Lastpage :
127
Abstract :
A novel dual-polarized microstrip patch array with a low-loss hybrid feed network suitable for X-band polarimetric airport surveillance radars (ASRs) is presented. A waveguide is used to excite a number of linear subarrays consisting of aperture-coupled microstrip cross-patch elements connected in series. The microstrip radiating part implements the dual polarization capability with low cross polarization, while the very reduced transmission line runs implied in the series-type feeding keeps ohmic and dielectric losses at a minimum. As a further major advantage of this antenna, the radiation pattern can be independently shaped in the two principal planes. In particular, the microstrip subarray is designed to produce a cosecant-squared pattern, whereas the waveguide provides a Taylor-like illumination distribution to have low side lobes in the longitudinal plane. As a result, the proposed array antenna is expected to stand out for high efficiency, polarization purity, simplicity of fabrication, light weight and compactness
Keywords :
airborne radar; airports; antenna feeds; antenna radiation patterns; aperture-coupled antennas; electromagnetic wave polarisation; linear antenna arrays; microstrip antenna arrays; planar antenna arrays; radar antennas; radar polarimetry; search radar; shaped beam antennas; ASR; Taylor-like illumination distribution; X-band polarimetric airport surveillance radar; aperture-coupled microstrip cross-patch elements; cosecant-squared pattern; cross polarization; dual polarization; linear subarray; microstrip planar array antenna; radiation pattern; shaped-beam hybrid-feed network; waveguide; Airports; Dielectric losses; Feeds; Microstrip antenna arrays; Microstrip antennas; Microstrip components; Planar arrays; Polarization; Radar antennas; Radar polarimetry; Microstrip antennas; millimeter wave antenna arrays; radar polarimetry; traveling wave arrays; waveguide arrays; waveguide transitions;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Radar Conference, 2006. EuRAD 2006. 3rd European
Conference_Location :
Manchester
Print_ISBN :
2-9600551-7-9
Type :
conf
DOI :
10.1109/EURAD.2006.280289
Filename :
4058273
Link To Document :
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