A dual-mode 6-9 GHz transmitter for OFDM-UWB

This paper presents a fully integrated dual-mode 6 to 9 GHz transmitter for both WiMedia and China MB-OFDM UWB applications.The proposed transmitter consists of a dual-mode I/Q LPF,an up-conversion mixer, a two-stage power driver amplifier and a broadband high-speed frequency divider with LO buffers for I/Q LO carrier generation.The measurement results show that the gain ripple of the transmitter is within±1.5/±2.8 dB from 6 to 8.7/9 GHz.The output IP3 is about+13.2 dBm,the output 1dBCP is around +2.8 dBm,and the LO leakage/sideband rejection ratio is about-35/-38 dBc.The ESD protected chip is fabricated with a TSMC 0.13μm RFCMOS process with a die size of 1.6×1.3 mm;and the core circuit consumes only 46 mA under a 1.2 V supply.