Method for up converting a transmitted signal and down converting a received signal
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United States of America Patent
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Aug 24, 2010
Grant Date -
Jul 5, 2007
app pub date -
Feb 28, 2007
filing date -
Jul 21, 2004
priority date (Note) -
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Abstract
An apparatus for frequency up conversion and down conversion using frequency multiplier circuits. The frequency multiplier circuits receive a lower frequency signal and are operated in a forward direction to provide a higher frequency output. The same frequency multiplier circuits are operated in a reverse direction by receiving a higher frequency signal and producing a lower frequency output. The frequency multiplier circuits preferably use heterojunction barrier varactor diodes to eliminate the need for DC bias or idler circuitry.
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