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Improved phase noise for dielectric resonators oscillators with broadband tuning
Author(s) -
Zhou Liang,
Wu Zhuo
Publication year - 2009
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.24334
Subject(s) - phase noise , flicker noise , dbc , resonator , electrical engineering , phase shift module , oscillator phase noise , amplifier , microwave , noise (video) , dielectric resonator , optoelectronics , materials science , noise temperature , electronic engineering , noise figure , engineering , telecommunications , insertion loss , cmos , computer science , artificial intelligence , image (mathematics)
In this article, we describe a method of design of very low phase noise dielectric resonators oscillators at 13 GHz. By using two Silicon Germanium transistors with total gains 8 dB and lower flicker noise corner between 10 kHz and 40 kHz, the phase noise of the oscillators can be achieved −125 dBc/Hz at 10 kHz offset. The resonator has unloaded Q around 14,000 at operating frequency and is then optimized and coupled to the amplifiers for minimum phase noise where Q L / Q 0 = 1/2 hence S 21 = −6 dB. To incorporate tuning, phase shifter is also investigated. The phase noise measurement system is also presented using two identical oscillators phase locked at the same frequency.© 2009 Wiley Pe riodicals, Inc. Microwave Opt Technol Lett 51: 1312–1316, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24334