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Search of a compact quadrature generator at around 60GHz with low phase noise at moderate power is the topic of this work. Discarding a double-frequency VCO followed by dividers-by-two given the high frequency range of operation, the most suitable topology borrowed by RF solutions is represented by cross-coupled LC voltage-controlled oscillators. However, the oscillation frequency dependence on the...
High-rate communications technology leveraging the unlicensed spectrum around 60 GHz is almost ready for deployment with several demonstrations of successful wireless links. One key aspect of the transceiver is the ability to handle analog fractional bandwidths in the order of 20%, challenging for both the linear processing chain and the frequency reference generator. In classical LC loaded stages...
A 65 nm CMOS sliding-IF receiver comprising 3 LNA gain stages, RF mixer, quadrature IF mixers, VCO and dividers is presented. Coupled resonators, both in the LNA and RF mixer, allow an important gain-bandwidth extension over conventional single LC neutralization. Realized prototypes show >13 GHz RF bandwidth around 60 GHz, <6.5 dB NF, -21 dBm P1dB, 12.6% VCO frequency range, and -115 dBc/Hz...
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