Author - Stephen P. Jurgiel

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Stephen P. Jurgiel	Write for Microwaves & RF

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August 2005 [Components]
Gauge Wideband LO Noise In Passive Tx/Rx Mixers
Passive integrated-circuit (IC) mixers are widely used in cellular base-station transceivers because of their low noise and outstanding linearity. Suitable for both downconversion in receivers and upconversion in transmitters, these mixers nonetheless can be hindered by wideband noise boosted by buffer amplifiers used to increase local-oscillator (LO) levels. Fortunately, a single noise parameter for passive mixer ICs makes it possible to calculate system-related impairments when using these...