Frequency tunable antenna
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United States of America Patent
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-
Jul 10, 2012
Grant Date -
Sep 30, 2010
app pub date -
Jan 29, 2010
filing date -
Mar 30, 2009
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is provided an antenna for tuning a resonant frequency. The antenna includes a first and a second arms connected to the antenna feeding portion at a common end thereof. The second arm has each of the plurality of branches including a switch for selecting a length of an electrical loop formed by the second arm and an end of a ground plane, each of the switches is connected to the ground plane. A first resonant frequency performed by the first arm is higher than a second resonant frequency by the second arm when each of the switches is open, and the first resonant frequency is lower than a third resonant frequency by the second arm when one of the switches is selected to connect the second arm and the ground plane so that the length of the electrical loop is maximum.
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