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Nonlinear design of a low‐phase‐noise oscillator based on load‐line analysis
Author(s) -
Lee MoonQue,
Ryu KeunKwan,
Yom InBok
Publication year - 2006
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21729
Subject(s) - phase noise , voltage controlled oscillator , electronic engineering , dbc , electrical engineering , engineering , offset (computer science) , oscillator phase noise , microwave , voltage , control theory (sociology) , computer science , noise figure , telecommunications , cmos , amplifier , programming language , control (management) , artificial intelligence
A novel approach to the design of a low‐phase‐noise oscillator is presented, which is enable 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 baseband ( 1/f ) noise investigated and predicted. In the implementation of an embedding up‐conversion factor are investigated and predicted. In the implementation of an embedding feedback network, generalized formulas 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 (VCO) for a satellite transponder. The phase‐noise characteristics of the manufactured VCO exhibit −114 dBc/Hz at 10‐kHz offset and −133‐dBc/Hz at 100‐kHz offset at 1748 MHz. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1544–1548, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21729