Title :
Design of low phase-noise voltage-controlled oscillator using tunable evanescent-mode cavity
Author :
Yuhao Liu ; Anand, A. ; Xiaoguang Liu
Author_Institution :
Univ. of California Davis, Davis, CA, USA
Abstract :
In this paper, a low phase-noise voltage-controlled oscillator using tunable evanescent-mode cavity is designed, fabricated, and measured. The oscillator is tuned by lumped element varactors placed on the top surface of a substrate-integrated evanescent-mode cavity. The tuning range of the oscillator is 783.6-976.8 MHz with peak output power of 6.97 dBm at 943.2 MHz. Over the tuning frequency the oscillator has a phase noise from -103.8 to -119.4 dBc/Hz at 100 kHz offset frequency and from -141.8 to -152.3 dBc/Hz at 1 MHz offset frequency. The resonator is compatible with RF MEMS tuner to yield a higher resonator Q and better phase noise performance.
Keywords :
UHF oscillators; micromechanical devices; phase noise; varactors; voltage-controlled oscillators; RF MEMS tuner; frequency 1 MHz; frequency 100 kHz; frequency 783.6 MHz to 976.8 MHz; frequency 943.2 MHz; low phase-noise voltage-controlled oscillator design; lumped element varactors; offset frequency; peak output power; phase noise performance; substrate-integrated evanescent-mode cavity; tunable evanescent-mode cavity; tuning frequency; tuning range; Cavity resonators; Phase noise; Q-factor; Resonant frequency; Tuning; Varactors; Voltage-controlled oscillators; cavity resonator; radiofrequency microelectromechanical systems;
Conference_Titel :
Radio and Wireless Symposium (RWS), 2014 IEEE
Conference_Location :
Newport Beach, CA
Print_ISBN :
978-1-4799-2298-7
DOI :
10.1109/RWS.2014.6830086
