Resonant loop resistive FET mixer
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United States of America Patent
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Nov 16, 1993
Grant Date -
N/A
app pub date -
Nov 5, 1991
filing date -
Nov 5, 1991
priority date (Note) -
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Abstract
A mixer includes a local oscillator (LO) matching network having an LO input port, an RF matching network also having an input port and an IF filter which provides an IF output from the mixer. A FET having a gate, drain and source operates at the center of the mixer. A resonant loop is connected between the drain and gate of the FET. The gate of the FET is connected to an output of the LO matching network. The drain of the FET is connected to an output of the RF matching network. The source of the FET is connected to an input of the IF filter. The resonant loop may incorporate a DC blocking capacitor which does not function as part of the resonant loop, but which serves to block DC allowing the drain and gate of the FET to be biased independently.
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