A CMOS Wideband LNA Using Multiple Phase Matched Frequency Staggered Resonators

A new architecture for wideband LNAs is introduced. High gain is obtained through use of narrowband tuned stages and broadband performance is simultaneously achieved by using multiple of them, with their resonant frequencies staggered, in parallel. Multipath phase matching is shown to be effective in optimizing passband gain and NF through analysis and simulation. This topology gives advantage with respect to broadband noise performance over conventional cascaded narrowband matching network based designs and considerable power reduction at similar gain in comparison to typical distributed amplifiers. Simulations in 0.13um CMOS process show 22.3 dB peak gain, 38% fractional bandwidth about 26.5-GHz, 2.8-3.8 dB NF over entire band and mid-band output P1dB of 2.6 dBm. It consumes 31 mA from 1.5 V supply.