Title :
A 5.84 GHz tunable SAW oscillator with frequency doubler for a DSRC system
Author :
Steinkamp, Jan ; Henkel, Frank ; Stehr, Uwe ; Eube, Cornelia ; Waldow, Peter ; Uda, Hisanori ; Hayashi, Hiroaki ; Kimura, Ryu ; Mizuno, Kazuo
Author_Institution :
IMST GmbH, Kamp-Lintfort, Germany
Abstract :
A varactor tuned oscillator with an external SAW resonator and integrated frequency doubler is developed on a low cost 0.8 μm SiGe BiCMOS technology for a DSRC application. The measured phase noise is -95.5 dBc/Hz at 10 kHz offset on a single-ended 50 Ω load. A PMOS accumulation-mode varactor is used for the fine tuning of the oscillation frequency within a tuning range of 800 kHz. Furthermore a 2nd not tunable oscillator is fabricated with an improved phase noise of -105.65 dBc/Hz at 10 kHz offset. Frequency doubling is achieved by using two unbalanced emitter coupled pairs with a fundamental frequency rejection of better than 20 dBc.
Keywords :
BiCMOS integrated circuits; Ge-Si alloys; circuit tuning; frequency multipliers; phase noise; radiofrequency integrated circuits; radiofrequency oscillators; semiconductor materials; surface acoustic wave oscillators; varactors; 0.8 micron; 5.84 GHz; DSRC wireless network; PMOS accumulation-mode varactor; RF circuit; SAW resonator; SiGe; SiGe BiCMOS technology; frequency doubler; phase noise; tunable SAW oscillator; tuning range; varactor tuned oscillator; BiCMOS integrated circuits; Costs; Germanium silicon alloys; Oscillators; Phase noise; Resonant frequency; Silicon germanium; Surface acoustic waves; Tuning; Varactors;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2003 IEEE
Print_ISBN :
0-7803-7694-3
DOI :
10.1109/RFIC.2003.1213990
