2014 · 19 citations · 5 references
EngineeringCommunicationElectrical EngineeringAnalog ElectronicsDigital CommunicationWireless CommunicationsLow-noise Circuit DesignMicrowave Integrated CircuitsMillimeter-wave CommunicationsMixed-signal Integrated Circuit DesignRadio-frequency Integrated CircuitsReceiver SystemsActive MixersDuplex CommunicationIntegrated Circuit MixersIsolationMixer CircuitsMixersPassive MixersTunable Mixers
We present a widely tunable passive mixer first duplexing transceiver which employs baseband noise-canceling, duplexing LNAs. The LNAs buffer transmitted signals to the mixer while canceling those signals in receive path. The transmitted signals are up-converted by the same mixer used for receiver down-conversion. The transceiver operates over a frequency range of 0.1-1.5GHz with -18dBm transmitted power. A 33dB linear isolation between receive and transmit (separated by 135kHz) as well as suppression of transmit-induced noise and nonlinearity are achieved.
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