Portable device for receiving and/or transmitting radio-transmitted messages comprising an inductive capacitive antenna
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United States of America Patent
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May 25, 1999
Grant Date -
N/A
app pub date -
Apr 24, 1997
filing date -
May 3, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Portable device for receiving and/or transmitting radio-transmitted messages comprising: a case (11; 42; 51), an antenna (12; 31, 32; 52, 53) capable of picking up both a magnetic component and an electric component of an electromagnetic field carrying radio-transmitted messages, and a micro-receiver (13) receiving the messages picked up by the antenna, said antenna comprising two conductive plates (15, 16; 31, 32; 52, 53) disposed so as to pick up the radial electric component (E.sub.r) of said electromagnetic field with respect to the body of the wearer. The antenna (12; 31, 32; 52, 53) is formed by a coil (17) comprising a turn arranged in said case (11; 42; 51) to pick up the azimuthal magnetic component (H.sub..PHI.) of said electromagnetic field around said body and the plates (15, 16; 31, 32; 52, 53) form part of said coil (17).
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