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Microstrip‐fed slot antennas backed by a very thin cavity
Author(s) -
Vallecchi Andrea,
Gentili Guido Biffi
Publication year - 2007
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.22073
Subject(s) - slot antenna , broadband , planar , microwave , microstrip , wideband , bandwidth (computing) , microstrip antenna , optics , radiation , materials science , wavelength , electrical engineering , optoelectronics , antenna (radio) , electronic engineering , engineering , physics , computer science , telecommunications , computer graphics (images)
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