A 3-5 GHz TH-UWB transmitter in 0.18-μm RF CMOS technology

• 作 者: 段吉海 王志功 李智群
• 机 构: School of Integrated Circuits Southeast University,School of Information & Communication, Guilin Uni
• 出 处: 半导体学报
• 发表日期: 2009年07期
• 关键词: transmitter oscillator hopping matching controllable wideband switch return supp

An RF transmitter is proposed for 3-5 GHz time-hopping ultra wideband(TH-UWB) wireless applications.The transmitter consists of a 4-GHz oscillator, a switch with a controllable attenuator and an output matching circuit.Through controlling the low frequency signals with time-hopping pulse position modulation(TH-PPM), the circuit supplies TH-UWB signals and can directly drive an antenna by a transmission line.The transmitter was implemented in a 0.18-μm CMOS technology;the output amplitude is about 65 mV at a 50 ? load from a 1.8-V supply, the return loss(S 11) at the output port is less than-10 dB, and the chip size is 0.7 × 0.8 mm2, with a power consumption of 12.3 mW.

An RF transmitter is proposed for 3-5 GHz time-hopping ultra wideband (TH-UWB) wireless applications. The transmitter consists of a 4-GHz oscillator, a switch with a controllable attenuator and an output matching circuit. Through controlling the low frequency signals with time-hopping pulse position modulation (TH-PPM), the circuit supplies TH-UWB signals and can directly drive an antenna by a transmission line. The transmitter was implemented in a 0.18-μm CMOS technology; mV at a 50? load from a 1.8-Vsupply, the return loss (S11) at the output port is less than-10 dB, and the chip size is 0.7x0.8 mm2, with a power consumption of 12.3 mW.