Multiple frequency antenna
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United States of America Patent
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Apr 17, 2012
Grant Date -
Nov 19, 2009
app pub date -
Oct 11, 2007
filing date -
Dec 12, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A helical element, which is operated in the frequency band of FM broadcast, is wound around the outer periphery of a rod-shaped support member 10. A line-shaped element 12, which is operated in the frequency band of terrestrial digital television broadcast, is disposed in a first groove 10a of a predetermined length formed on the outer periphery of the support member 10 from the lower end thereof. With this arrangement, a multi-frequency antenna 1, which is operated in the frequency band of FM broadcast and the frequency band of terrestrial digital television broadcast, can be arranged, and the entire length L of the helical element can be reduced and it can be operated in a plurality of frequency bands with the effect of the line-shaped element 12.
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