2003 · 41 citations · 5 references
EngineeringElectrical EngineeringAnalog ElectronicsMicroelectronicsMicrowave EngineeringHigh-frequency Semiconductor DevicesMicrowave Integrated CircuitsMicrowave MixersMicrowave Passive ComponentsMixed-signal Integrated Circuit DesignRadio-frequency Integrated CircuitsActive MixersBroadband Mixer DesignIntegrated Circuit MixersMixer CircuitsMixersSingle-balanced MixersSuppression
We have developed a novel broadband active balun. It consists of series-connected common-gate FETs and a common-source FET. The active balun achieved broadband characteristics by using series-connected common-gate FETs with the same gradient as the phase performance of the common-source FET. From 500 MHz to more than 10 GHz, the fabricated active balun shows a phase error of less than 5 degrees. A fabricated single balanced mixer using the proposed active balun had LO suppression of more than 40 dB over an LO frequency range of between 1 and 5 GHz.
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