Title :
Noise characteristics of an oscillator with a barium strontium titanate (BST) varactor
Author :
Victor, A. ; Nath, J. ; Ghosh, D. ; Boyette, B. ; Maria, J-P. ; Steer, M.B. ; Kingon, A.I. ; Stauf, G.T.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., NC, USA
Abstract :
The phase noise of an oscillator with a thin-film barium strontium titanate (BST) capacitive tuning element, or varactor, is characterised and benchmarked against the same oscillator with a silicon semiconductor junction varactor. Phase noise tracks closely with varactor Q within a specific voltage range as expected. Compared to the semiconductor varactor-based oscillator, the BST-based oscillator demonstrates reduced phase noise degradation near zero volts, but greater phase noise degradation when operated near breakdown.
Keywords :
Q-factor; barium compounds; circuit tuning; ferroelectric capacitors; ferroelectric thin films; phase noise; semiconductor device breakdown; strontium compounds; thin film capacitors; voltage-controlled oscillators; Q reduction; barium strontium titanate; capacitive tuning element; oscillator noise characteristics; phase noise; thin-film BST varactor;
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings
DOI :
10.1049/ip-map:20050068
