Dual-band antenna
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United States of America Patent
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-
Jan 3, 2012
Grant Date -
Apr 29, 2010
app pub date -
Jan 30, 2009
filing date -
May 22, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides a dual-band antenna that can be operated at two frequencies without providing the choke coil. A first element operated in a high-frequency-side band is formed in a surface of a print board using a print pattern. A second element operated in a low-frequency-side band is formed in an upper portion of a rear surface of the print board so as not to overlap the first element. A power is fed to the first element from a power feeding point located at a lower end of the print board, and the power is fed to the second element through a throughhole made in a middle of the first element. The power is fed to the second element from the throughhole through a long and thin power feeding line, and the power feeding line exhibits a high impedance to a high frequency. A slit is formed in the first element corresponding to the power feeding line.
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