Loop antenna for cell phone having a metallic or non-metallic casing
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United States of America Patent
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Issued Date -
Apr 8, 2010
app pub date -
Oct 8, 2008
filing date -
Oct 8, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A loop antenna used in a cell phone having a circuit board and a casing housing the circuit board is disclosed to include a loop extending around the border of the circuit board, a ground end extending from one end of the loop and electrically connected to a ground plane of the circuit board, a feed end extending from the opposite end of the loop and electrically connected to the circuit board for signal input, and two cut-off ends formed in a middle part of the loop to cut off the loop. The two cut-off ends are electrically connected to the casing of the cell phone if the casing is a metallic casing, or short-circuited if the casing of the cell phone is a non-metallic casing.
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