Abstract
AbstractA small‐size multiband planar antenna can be obtained using a long parasitic shorted strip and a monopole feed encircled by the same. Such a configuration can lead to a small antenna size for multiband operation, and a promising design with a small size of 12 × 35 mm2 for covering three‐band LTE700/2300/2500 operation (704–787/2300–2400/2500–2690 MHz bands) in the tablet computer is presented. The antenna is easy to fabricate on one surface of an FR4 substrate and is composed of an inverted‐L strip as the monopole feed and a long parasitic shorted strip encircling the inverted‐L monopole. The long shorted strip is parasitically excited to generate a 0.25‐wavelength resonant mode at about 750 MHz to cover the LTE700 operation, while the inverted‐L monopole generates a 0.25‐wavelength resonant mode at about 2.5 GHz to cover the LTE2300/2500 operation. Details of the proposed antenna are described. Radiation characteristics of the antenna and its body specific absorption rate results for tablet computer applications are also presented. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:81–86, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26507
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