A Distributed RF Front-End for UWB Receivers
Safarian, A.; Lei Zhou; Heydari, P.
Custom Integrated Circuits Conference, 2006. CICC apos;06. IEEE
Volume , Issue , 10-13 Sept. 2006 Page(s):805 - 808
Digital Object Identifier 10.1109/CICC.2006.321013
Summary:This paper presents the design and fabrication of a novel silicon-based distributed RF front-end for ultra wideband (UWB) receivers (RX). The proposed UWB distributed RF front-end, called UWB-DRF, is suitable for UWB IF transceiver architectures. The circuit constitutes of combined low-noise amplifier (LNA) and down-conversion mixer cells distributed along the artificial transmission lines (TLs), to achieve wideband conversion gain, noise figure (NF), and linearity. A 3 stage UWB-DRF was fabricated in a 0.13 mum CMOS process. The prototype UWB-DRF achieves 13.8-15.5 dB gain over the entire UWB frequency range, while exhibiting flat NF of 5.2 dB across the band. The radio-frequency (RF), local-oscillator (LO), and intermediate-frequency (IF) ports are wideband-matched to 50Q. A programmable RF termination allows the UWB-DRF to achieve higher gain of 17.7 dB and lower NF of 3.5 dB, while trading off with few decibels of mismatch at the RF input port
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