Abstract
AbstractIn this article, a small‐size printed monopole embedded with a printed narrow strip as a distributed inductor for application in the mobile phone to achieve GSM850/900/1800/1900/UMTS pentaband wireless wide area network operation is presented. With the printed distributed inductor, the fundamental (lowest) resonant mode of the proposed antenna can be effectively shifted to lower frequencies with a wide operating bandwidth, owing to the contributed inductance of the printed distributed inductor compensating for the increased capacitance resulting from the decreased resonant length of the monopole. In this study, the proposed antenna can be printed on the small no‐ground portion of size 14 × 40 mm2 on the main circuit board of the mobile phone, making it easy to fabricate at low cost and generally showing no thickness above the circuit board; the latter is very attractive for thin‐profile mobile phone applications. The proposed monopole antenna is studied in detail in this article. The results also show that the antenna is very suitable to be placed at the bottom of the mobile phone; in this case, the antenna meets the specific absorption rate limit for practical applications. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2903–2908, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24775
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