A K-band VCO-based Impulse Generator for UWB Radar Sensors

A CMOS K-band impulse generator for UWB radar IC is presented. To provide the short UWB impulse signal, a carrier-based impulse generator is employed, which combines the VCO and active RF switch for windowing the LO signal. The tunability of the center frequency and bandwidth are 22.3 - 25.2 GHz and 0.18 - 3 GHz, respectively. The UWB impulse generator is fabricated in a 65 nm CMOS process and consuming 21.3 mW from a single 1.2-V supply.