Lurz, FabianFabianLurzHofstetter, PatrickPatrickHofstetterLindner, StefanStefanLindnerLinz, SarahSarahLinzMichler, FabianFabianMichlerWeigel, RobertRobertWeigelKölpin, AlexanderAlexanderKölpin2020-07-012020-07-012018-03-09IEEE Topical Conference on Wireless Sensors and Sensor Networks, WiSNet : 84-87 (2018-03-09)http://hdl.handle.net/11420/6543This paper presents an optimized 24 GHz frequency synthesizer for low-power multi-tone radar systems and discusses the underlying design considerations as well as the circuit and system concepts. Core component is a fast locking phase locked loop (PLL) with a 24 GHz voltage controlled oscillator (VCO). The system shows a total turn-on and lock time below 50 microseconds and, due to range-correlation in continuous wave (CW) short-range radar systems, still a good phase noise. With the proposed optimized system design and by intermittently transmitting, the average power consumption of the complete system was significantly reduced down to, e.g., 1 mW for 20 dual-tone signals per second.enConference Paper10.1109/WISNET.2018.8311571Other