Antenna device commonly used for two frequencies
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United States of America Patent
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Jan 31, 2006
Grant Date -
May 19, 2005
app pub date -
Jul 28, 2004
filing date -
Jul 29, 2003
priority date (Note) -
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Abstract
A patch antenna for a first frequency is disposed on a first face of a dielectric substrate, and has a first size. A coil antenna for a second frequency is disposed on the first face of the dielectric substrate so as to surround the patch antenna, and has a second size which is larger than the first size. A ground member is disposed on a second face of the dielectric substrate, and has a third size which is larger than the first size and smaller than the second size.
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