A planar built-in antenna with a balance-fed configuration, denoted a balance-fed planar inverted-F antenna (BPFA), has been developed for the IMT-2000, third-generation (3G) mobile communication system. The BPFA features balanced operation, which leads to a significant reduction in the current induced on the telephone body and therefore the absence of any significant effect caused by the operator's hand.
References
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T. Taga ,
K. Tsunekawa
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Performance analysis of a built-in planar inverted-F antenna for 800MHz band portable radio units.
IEEE J. Sel. Areas Commun.
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5 ,
921 -
929
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Ogawa, K., Matsuyoshi, T., Monma, K.: `An analysis of the performance of a handset diversity antenna influenced by head, hand and shoulder effects at 900 MHz', IEEE AP-S Int. Symp. Dig., 1999, p. 1122–1125.
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K. Ogawa ,
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A diversity antenna for very small 800 MHz band portable telephones.
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http://iet.metastore.ingenta.com/content/journals/10.1049/el_20010369
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