Methods and apparatus for implementation of an antenna for a wireless communication device
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United States of America Patent
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-
Apr 17, 2007
Grant Date -
May 4, 2006
app pub date -
Oct 20, 2005
filing date -
Oct 29, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A wireless communication device includes an antenna configured with two conductive elements separated by an insulating medium. One conductive element is a ground plane and the other is a microstrip line. The ground plane is formed with a bend proximate an end. The microstrip line and the ground plane exhibit a characteristic impedance that may vary along the length of the microstrip line. The separation distance of the microstrip line from the ground plane is changed to reduce the resonant frequency of the microstrip line. A second microstrip line with an open end and another end shorted to the ground plane is operative to prevent RF current from flowing on the backside of the ground plane. A backside of the ground plane and the second microstrip line may be covered with a lossy magnetic medium to reduce the near field above the backside of the ground plane.
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