Research And Design Of 6.2～9.4 GHz UWB Receiver Front-end

As a short-range high data-rate wireless communication standard, UWB (Ultra-Wide Band) technology is the most promising solution for WPAN (Wireless Personal Area Network).The UWB system operates in the frequency band from 3.1 GHz to 10.6 GHz, with a maximum data-rate of 480Mb/s and a minimum data-rate of 11 OMb/s.This thesis researched and designed a receiver front-end for 6.2～9.4 GHz DC-OFDM UWB system, which can be applied in UWB China National Standard, including a common-gate, capacitor-coupled low noise amplifier (LNA), and a I/Q merged, folded down-conversion mixer. The thesis starts with the UWB system specification, explicitly introducing and calculating the critical parameters of the receiver front-end; then compares different receiver architectures and selects a Zero-IF structure to be the realization of the UWB receiver; furthermore, analyzes the key parameters of receiver front-end, such as noise figure, input matching, conversion gain and linearity, and provides with mathematics verification and complete simulation results and discusses the variable gain implementation; finally, introduces layout implementation and measurement methods and puts forward the future revision plan.The chip was taped out independently with TSMC 0.13μm 1P8M RF CMOS Process. Measurement results show less than-10 dB S11,conversion gain of 21.3～22.8 dB with less than 2 dB gain flatness, noise figure of 4.5-7.4 dB and IIP3 of -10.1 dBm over 6.2～9.4 GHz frequency band, consuming only 13.2 mW from a 1.2 V supply voltage.