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The development of compact antennas plays an important role in the rapidly growing mobile communication market.This paper presents a novel design technique of the quad-band small internal antenna covering GSM-900/DCS-1800/PCS-1900/IMT-2000 bands.The innovative quad-band built-in handset antenna is developed within the limit of a 44×25×4 mm 3 volume.The following document describes a new idea of increasing operational bandwidth for the compact planar inverted F antenna (PIFA).The proposed compact antenna introduces the open-end slots in the ground plane almost all under the radiating patch.The size reduction method is attractive for practical antenna implementations.In addition, the end user's hand handling effects on the performances of the proposed antenna are studied.
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Lin et al. (2010) studied this question.
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