Coupling flatness compensated directional coupler
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United States of America Patent
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N/A
Issued Date -
Jul 27, 2006
app pub date -
Jan 24, 2005
filing date -
Jan 24, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A directional coupler that has improved coupling flatness. The directional coupler includes a first, second and third coupler. Each of the couplers has an input port, an output port, a forward coupled port and a reverse coupled port. The forward coupled port of the first coupler is connected to the input port of the second coupler. The reverse coupled port of the first coupler is connected to ground. The output port of the second coupler is connected to the input port of the third coupler. The output port of the third coupler forms a second forward coupled port. The second and third couplers reduce the variation in coupling over a frequency range.
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