Ultra-wideband, directional coupler and method of implementation
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United States of America Patent
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Oct 26, 2010
Grant Date -
N/A
app pub date -
Jun 20, 2008
filing date -
Jun 22, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is a wideband directional coupler comprising first and second coupled transmission lines and first and second equalizers connected at opposite ends of the coupled portion of the second transmission line. Illustratively, the first and second equalizers are RC filters. The first and second equalizers are designed to have transmission characteristics that vary with frequency so as to offset the frequency variation of the coupling factor of the coupled transmission lines.
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