Proceedings ArticleDOI
622 MHz high frequency fundamental composite crystal resonator with an air-gapped electrode
M. Umeki,T. Sato,H. Uehara,M. Okazaki +3 more
- pp 365-368
TLDR
In this article, the authors developed a 622 MHz fundamental crystal resonator using composite wafers with an air-gapped electrode to reduce the mass loading effect of the electrode.Abstract:
We have developed a 622 MHz fundamental crystal resonator using composite wafers with an air-gapped electrode. To reduce the mass loading effect of the electrode, we introduced a three layer laminated quartz wafer and an air-gapped electrode. The electrical characteristics of the 622 MHz fundamental crystal resonator have satisfied the target specification by using a new process and structure.read more
Citations
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Phase noise in microwave oscillators and amplifiers
TL;DR: In this article, the authors present an experimental method for determining additive phase noise of an unmatched transistor in a stable 50 Ω environment, which is used as input for the design of oscillators and power amplifiers.
Journal ArticleDOI
Latest Technology, Technological Challenges, and Market Trends for Frequency Generating and Timing Devices [Application Notes]
Ajay K. Poddar,Ulrich L. Rohde +1 more
TL;DR: The second and third generation of MEMS oscillators will target a larger market for compact oscillators in order to meet TCXO and OCXO performance requirements, which will produce further synergies for the industry as mass production becomes cheaper and easier as mentioned in this paper.
Book ChapterDOI
Numerical Simulation in Aortic Arch Aneurysm
TL;DR: This chapter is to describe the numerical simulation and computer modeling work in aortic arch aneurysm, one of the most complex flow situations found in the cardiovascular system.
Proceedings ArticleDOI
High performance VCXO with 622.08MHz Fundamental Quartz Crystal Resonator
TL;DR: An overview of a VCXO using 622.08MHz fundamental quartz crystal resonator can be found in this paper, where the frequency pull range is +/-190ppm (control voltage 1.65+/-1.65V), the phase jitter is 150fs-rms (12kHz to 20MHz).
Journal ArticleDOI
Propagation of thickness-twist waves in a piezoelectric ceramic plate with unattached electrodes.
TL;DR: Analysis of propagation of thickness-twist waves in an unbounded piezoelectric ceramic plate with air gaps between the plate surfaces and two electrodes shows that the wave frequency or speed is sensitive to the air gap thickness.
References
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Proceedings ArticleDOI
Miniaturization of angular rate sensor element using bonded quartz tuning fork
TL;DR: In this paper, the authors developed an extraordinarily miniaturized quartz tuning fork angular rate sensor element (5.3/spl times/0.94 /spl times /0.24 mm) by bonding two monolithic wafers with reversing x axes.