Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2007-09-25
2007-09-25
Kincaid, Lester G. (Department: 2617)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S575200, C455S575500
Reexamination Certificate
active
10792789
ABSTRACT:
A dielectric sheet is attached to the inner surface of the portable telephone housing. The dielectric sheet extends in the area between the user's head and a whip antenna of the portable telephone. The real part and the imaginary part of the relative dielectric constant of the dielectric sheet is properly selected such that the dielectric sheet can reduce SAR (Specific Absorption Rate) and improve antenna efficiency.
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patent: 6615026 (2003-09-01), Wong
patent: 2001/0053673 (2001-12-01), Toyoda et al.
patent: 2003/0107025 (2003-06-01), Okayama et al.
patent: 2002-151881 (2002-05-01), None
Jianqing Wang et al., Realization of Low SAR in Human Head by Surface Current Suppression on Portable Telephone, Technical Report of IEICE EMCJ98-45 Sep. 1998, Dept of Electrical and Computer Engineering, Nagoya Institute of Technology Gokiso-cho, Showa-ku, Nagoya 466-8555, no month listed.
Osamu Harhimoto et al., Numerical Discussion on Decrement of Human Body SAR by Means of Shielding Material, Aug. 1996,.vol. J 79-B II No. 8 pp. 486-491 1996, no month listed.
Eiji Hanuki et al., Investigations on Antenna Radiation Efficiency Improvement of Cellular Phones With a Low Loss Magnetic Plate, Technical Relport of IEICE Jul. 2000.
Yusuke Watanabe et al., A Study on Improvement of Antenna Radiation Efficiency for Cellular Phones by a High Permeability Magnetic Sheet, Issed in 2003, no month listed.
Furukawa Yuko
Koyamashita Yuji
Kusunoki Shigeru
Takagi Kazuhisa
Tsuchiya Sohji
Kabushiki Kaisha Fine Rubber Kenkyuusho
Kincaid Lester G.
Shedrick Charles
Young & Thompson
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