A dual-band direct-conversion RF front-end for WiMedia UWB receiver |
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Authors: | Jouni Kaukovuori Jussi Ryynänen Mikko Kaltiokallio Kari A I Halonen |
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Affiliation: | (1) Electronic Circuit Design Laboratory/SMARAD2, Helsinki University of Technology, Espoo, 02015, Finland |
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Abstract: | This paper describes a direct-conversion RF front-end designed for a dual-band WiMedia UWB receiver. The front-end operates
in band group BG1 and BG3 frequencies. It includes multi-stage LNAs, down-conversion mixers, a polyphase filter for quadrature
local oscillator (LO) signal generation, and LO buffers. The UWB receiver is targeted for a mobile handset, where several
other radios can be simultaneously on. Therefore, special attention was paid on minimizing the interference from different
wireless systems. The front-end achieves approximately 26-dB gain and 4.9–5.6-dB noise figure (NF) across three sub-bands
of BG1. In BG3 mode it obtains 23–26-dB gain and 6.9–7.7-dB NF. The front-end consumes 48.1 and 42.7 mA from a 1.2-V supply
voltage in BG1 and BG3 operation modes, respectively. The chip was implemented in a 0.13-μm CMOS. |
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