Mixer optimization for active radar warning receiver
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United States of America Patent
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Feb 17, 2004
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N/A
app pub date -
Mar 18, 2003
filing date -
Mar 18, 2003
priority date (Note) -
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Abstract
A method to optimize a mixer (20) includes setting a DC bias current (24) at a predetermined level correlated to an RF frequency or band of interest, and varying the power output (32) of a local oscillator (36) until the DC voltage (66) of the mixer (20) is at a predetermined voltage. The setting for the local oscillator (36) is then stored, such as in volatile RAM (60), for use during normal operation of the receiver (10) to produce IF signals (40) correlated to the RF frequencies or band or interest. The process may be implemented on power-up of the receiver and/or periodically during use thereof in the field to reoptimize the mixer (20), and may be undertaken with different predetermined currents and voltages for different RF frequencies and/or bands.
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