Abstract
The use of a parallel-resonant (PR) slit for dual-band bandwidth enhancement of a small-size printed monopole slot antenna to achieve the wireless wide area network operation in the tablet computer is demonstrated. The antenna is easy to fabricate by printing on a thin FR4 substrate of size 10 × 45 mm2. The PR slit, mainly configured as a spiral shape to occupy a small area of about 6.5 × 6.5 mm2 on the FR4 substrate, generates two parallel resonances at about 1.2 and 2.5 GHz to, respectively, result in dual-resonance excitation of the quarter-wavelength and half-wavelength modes of the monopole slot at about 0.9 and 1.9 GHz. In this case, two wide operating bands are obtained to, respectively, cover the 824–960 and 1710–2170 MHz bands. That is, with the dual-band bandwidth enhancement contributed by the PR slit, the proposed antenna can cover the GSM850/900/1800/1900/UMTS bands with a small planar size. Details of the proposed antenna are described in the article. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:40–45, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27273
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