Title :
Nonlinear design of low phase noise oscillator based on load line analysis
Author :
Lee, Moon-Que ; Ryu, Keun-Kwan ; Yom, In-Bok ; Lee, Sung-Pal
Author_Institution :
Electron. & Telecommun. Res. Inst., Taejon, South Korea
Abstract :
A novel approach to the design of a low phase noise oscillator is presented, which enables one to optimize the phase noise and the oscillation power simultaneously. Through a load line analysis of a transistor without feedback, the oscillation power and the base-band (1/f) noise up-conversion factor are investigated and predicted. In the implementation of an embedding feedback network, a generalized formulae considering the quality factors of the embedding feedback elements are newly introduced. The proposed approach is applied to the design of an engineering model voltage controlled oscillator for a satellite transponder. The phase noise characteristics of the manufactured VCO exhibit -114dBc/Hz @10 kHz offset and -133 dBc/Hz @100 kHz offset at 1748 MHz
Keywords :
1/f noise; Q-factor; circuit feedback; nonlinear network synthesis; phase noise; satellite communication; transponders; voltage-controlled oscillators; 1/f noise up-conversion; 10 kHz; 100 kHz; 1748 MHz; VCO; base-band noise up-conversion factor; engineering model; feedback network; load line analysis; low phase noise oscillator; nonlinear design; oscillation power; phase noise characteristics; quality factors; satellite transponder; voltage controlled oscillator; Design engineering; Design optimization; Feedback; Manufacturing; Phase noise; Power engineering and energy; Q factor; Satellites; Transponders; Voltage-controlled oscillators;
Conference_Titel :
Radio and Wireless Conference, 2001. RAWCON 2001. IEEE
Conference_Location :
Waltham, MA
Print_ISBN :
0-7803-7189-5
DOI :
10.1109/RAWCON.2001.947552
