Low Profile Helical Planar Radio Antenna with Plural Conductors
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United States of America Patent
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Issued Date -
Nov 6, 2008
app pub date -
May 24, 2006
filing date -
May 27, 2005
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Abandoned
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Abstract
A low profile, compact planar antenna having an approximately flat, dual helical or helix shape is affixed to a supporting substrate. The resonant frequency of the device is determined by parameters including and not limited to length, width, and pitch angle of the helix. An additional helical element is added to induce a second resonant frequency and increase bandwidth. The antenna has an omni-directional radiation pattern, is highly efficient, and is provided in a compact profile suitable for use in a small battery operated device, such as water, gas or electricity meters as well as industrial sensors and security devices.
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