期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 55, 期 8, 页码 2185-2193出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2007.901854
关键词
aperture efficiency; electromagnetic bandgap (EBG) materials; leaky waves; reflector antenna feeds
We describe the use of electromagnetic bandgap (EBG) super-layers to improve the shape of reflectors illumination function. Following an investigation of the leaky wave pole singularities of the EBG Green's function, the shape of the radiation patterns of small apertures in, ground planes are optimized. The maximization of the reflector aperture efficiency can be obtained by; properly tuning the super layers geometrical parameters. A prototype of such feed has been designed, manufactured and tested. The results indicate that the inclusion of the EBG, increases the aperture efficiency of the feed+reflector system to values higher than 80%, over a 10% bandwidth. These low profile feeds are compatible with printed circuit board and/or integrated technology.
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