Antenna device comprising capacitively coupled radiating elements and a hand-held radio communication device for such antenna device
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United States of America Patent
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Jun 4, 2002
Grant Date -
N/A
app pub date -
May 17, 1999
filing date -
May 18, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The object of the present invention is to achieve an antenna for both receiving and transmitting circularly polarized RF signals which is smaller and lighter than prior art antennas as well as to achieve one antenna for both receiving and transmitting circularly polarized RF signals which has better characteristics for a given physical length than prior art antennas. This is achieved by providing an N-helical-filar antenna with N radiating elements coaxially arranged and defining a cylindrical envelope where each individual radiating element is capacitively coupled to another radiating element.
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