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Microstrip-fed slot antennas backed by a very thin cavity

✍ Scribed by Andrea Vallecchi; Guido Biffi Gentili

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
243 KB
Volume
49
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

Slot antennas with a backing cavity for unidirectional radiation are investigated with the aim of achieving a thin structure capable of reasonably broadband operation. By tuning together the slot length and the cavity cross‐section, a very low‐profile cavity‐backed slot (CBS) is demonstrated. The cavity thickness of this slot antenna is about 10 times smaller than conventional one‐quarter wavelength cavities, which would allow constructing this antenna even with standard cost‐effective multilayer planar technology. The high gain and fairly wideband operation are the major advantages of the proposed configuration, which features a bandwidth of about 10% at a center frequency of 1.8 GHz with radiation efficiency in excess of 80%. Measured data are presented and compared with simulation results obtained by both the method of moments (MoM) and the finite integration technique (FIT). © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 247–250, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22073

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