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This paper describes a 28GHz CMOS direct conversion transceiver with packaged 2×4 patch antenna arrays for 5G communication. Test results show good RF performances of Rx NF 6.7dB, Maximum Tx EIRP 31.5dBm (1PA Pout_sat =10.5dBm), LO integrated phase noise −37.8dBc (0.67°), Rx/Tx EVM around 2.2% (−33.1dB) at mid RF power, and well-fitted beam control capability.
This letter reports a cross-coupled transistor structure that allows simple routing, induces no gate-drain overlap interconnect capacitances, minimizes the parasitic resistances of interconnects, allows smaller drain-junction parasitic capacitances, and provides inherent common-centroid characteristic, all of which help to improve the high-frequency and wideband performances of CMOS voltage-controlled...
5.5 GHz LC VCO is fabricated using 0.18 um CMOS process. And this paper presents the phase noise performance dependence on the tail current source transistor in standard CMOS technology. The LC VCO has the minimum point of frequency variation and the optimal selection of tail current at maximum 2nd-order generation can achieve good phase noise performance. By optimizing the tail current, we have achieved...
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