HIGH FREQUENCY MIXER, METHOD AND SYSTEM
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United States of America Patent
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Issued Date -
Sep 18, 2014
app pub date -
Mar 15, 2013
filing date -
Mar 15, 2013
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Abstract
A thin film circuit, particularly desirable for satellite communications, mixes RF and an LO giga-hertz-range input signals to yield an IF signal by splitting the LO and RF signals into two, with a 180 degree phase shift introduced into one of the resulting signals. The LO and RF signals are then each mixed in parallel mixers. The outputs of the mixers have the IF signal with spurious (spur) signals in frequencies that are multiples of the frequencies of the RF or LO signals. The outputs are mixed together so that some of the spur signals cancel each other out and the IF signals are added in phase.
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