Title :
A 20GHz VCO and frequency doubler for W-band FMCW radar applications
Author :
Weihu Wang ; Takeda, Y. ; Yi-Shin Yeh ; Floyd, Brian
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
Abstract :
This paper presents a low-noise Colpitts VCO with transformer-based resonator and a 20-to-40GHz frequency doubler for use in 76~77GHz long-range radar and 77~81GHz short-range radar transceivers. To reduce supply pushing and AM-to-PM noise conversion in the high-gain VCO, a differentially tuned, transformer-coupled varactor is used. Implemented in 0.12-μm SiGe BiCMOS technology, the VCO and doubler achieve an 11% continuous tuning range from 37.5-42GHz, and a phase noise between -103 and -106dBc/Hz at 1MHz offset from the 40GHz carrier.
Keywords :
BiCMOS integrated circuits; CW radar; FM radar; Ge-Si alloys; frequency multipliers; microwave oscillators; varactors; voltage-controlled oscillators; AM-to-PM noise conversion; SiGe; SiGe BiCMOS technology; W-band FMCW radar applications; differentially tuned transformer-coupled varactor; frequency 20 GHz to 40 GHz; frequency 37.5 GHz to 42 GHz; frequency 76 GHz to 77 GHz; frequency 77 GHz to 81 GHz; frequency doubler; high-gain VCO; long-range radar; low-noise Colpitts VCO; short-range radar transceivers; size 0.12 mum; supply pushing; transformer-based resonator; Couplings; Frequency measurement; Resonant frequency; Three-dimensional displays; Varactors; Voltage-controlled oscillators; Microwave oscillators; Phase noise; Quality factor; Transformer;
Conference_Titel :
Silicon Monolithic Integrated Circuits in Rf Systems (SiRF), 2014 IEEE 14th Topical Meeting on
Conference_Location :
Newport Beach, CA
DOI :
10.1109/SiRF.2014.6828522
