End-fed sleeve dipole antenna comprising a ¾-wave transformer
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United States of America Patent
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Nov 26, 2013
Grant Date -
Aug 2, 2012
app pub date -
Jan 27, 2011
filing date -
Jan 27, 2011
priority date (Note) -
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Abstract
An end-fed sleeve dipole is provided herein with improved impedance match and increased bandwidth by incorporating a ¾-wavelength transformer in the antenna design. The ¾-wavelength transformer is compatible with a number of different choking schemes, including but not limited to, a single ¼-wave choke sleeve, a single ¼-wave choke sleeve with additional ferrite beads, and two or more ¼-wave choke sleeves with or without ferrite beads. In some embodiments, one or more shunt resonators may be used to provide additional impedance compensation.
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