Balun transformer
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United States of America Patent
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May 19, 2015
Grant Date -
Feb 13, 2014
app pub date -
Jul 18, 2013
filing date -
Aug 9, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A balun transformer includes an unbalanced terminal, two balanced terminals, a directional coupler, a low pass filter, and a high pass filter. The directional coupler includes first, second, third and fourth terminals. The first terminal is connected to the unbalanced terminal. A predetermined phase difference exists between the output signal of the second terminal and the output signal of the third terminal. The second terminal is connected to the first terminal by a line constituting the directional coupler. The low pass filter is connected between the second terminal and one of the balanced terminals. The high pass filter is connected between the third terminal and the other balanced terminal.
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