Wideband baluns and methods of their manufacture
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United States of America Patent
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May 24, 2016
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N/A
app pub date -
Dec 17, 2014
filing date -
Dec 17, 2014
priority date (Note) -
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Abstract
A balun structure comprises an unbalanced input terminal, a first planar coil connected to the unbalanced input terminal, a second planar coil connected to the first planar coil, a third planar coil stacked in relation to the first planar coil, a first balanced output terminal connected to the third planar coil, a fourth planar coil stacked in relation to the second planar coil, and a second balanced output terminal connected to the fourth planar coil, wherein a first length of the first planar coil and a third length of the third planar coil differ by one twelfth to one twentieth of an operational wavelength and a second length of the second planar coil and a fourth length of the fourth planar coil differ by one twelfth to one twentieth of the operational wavelength.
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