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December 2009 [Components] Taking Measure Of Microwave Mixers Microwave mixers are widely used in commercial and military electronic systems for frequency conversion. They are essential for shifting the frequency of a signal downward (downconversion) or upward (upconversion) as might be needed in a receiver and transmitter, respectively. By understanding some fundamental concepts about mixer operation and performance, specifying a mixer for an application can be greatly simplified. A frequency mixer is a three-port component, with two ports... December 2009 [Components] Mixers Terminate Intermod Distortion Minimizing intermodulation distortion (IMD) in mixers can benefit many commercial and military RF/microwave systems. For that reason, Marki Microwave has developed its two-tone-terminator (T3) line of mixers for superior suppression of two-tone IMD. The T3 mixers cut conversion loss to typically only 7 dB from 10 MHz to 12 GHz, with input third-order intercept (IIP3) points that are typically 10 dB (and as much as 20 dB) higher than the local oscillator (LO) drive level. Conversion loss is... |
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