Low phase noise, low power consuming 3.7 GHz oscillator based on high-overtone bulk acoustic resonator

Hongyu Yu, Chuang Yuan Lee, Wei Pang, Hao Zhang, Eun Sok Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations


This paper describes the oscillator based on High-overtone Bulk Acoustic Resonator (HBAR) at 3.7 GHz for Chip Scale Atomic Clock (CSAC) application. The HBAR is built on a 400μm thick sapphire with Al/ZnO/Al sandwich layers having thicknesses 0.1μm/0.8μm/0.-1μm, which ensures the best acoustic coupling and highest Q (above 19,000) at around 3.7GHz. The oscillators have been designed, fabricated and measured to have very low phase noise and low power consumption. The oscillator when measured with Agilent 4448 spectrum analyzer is measured to oscillate at 3.677 GHz with output signal power of -15dBm and phase noise of -108 dBc/Hz at 10kHz offset and -125dBc/Hz @100kHz offset, respectively, while consuming only 6.21 mW.

Original languageEnglish (US)
Title of host publication2007 IEEE Ultrasonics Symposium Proceedings, IUS
Number of pages4
StatePublished - 2007
Externally publishedYes
Event2007 IEEE Ultrasonics Symposium, IUS - New York, NY, United States
Duration: Oct 28 2007Oct 31 2007

Publication series

NameProceedings - IEEE Ultrasonics Symposium
ISSN (Print)1051-0117


Other2007 IEEE Ultrasonics Symposium, IUS
Country/TerritoryUnited States
CityNew York, NY


  • Atomic clock
  • GHz pierce oscillator
  • High-overtone Bulk Acoustic Resonator (HBAR)
  • Oscillator
  • Phase noise

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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