By Topic

2008 IEEE International Frequency Control Symposium

Date 19-21 May 2008

Filter Results

Displaying Results 1 - 25 of 180
  • Welcome from the General Chair, Bernardo Jaduszliwer

    Publication Year: 2008, Page(s):i - ii
    Request permission for commercial reuse | PDF file iconPDF (511 KB) | HTML iconHTML
    Freely Available from IEEE
  • 2008 IEEE international frequency control symposium - Committees

    Publication Year: 2008, Page(s):iii - v
    Request permission for commercial reuse | PDF file iconPDF (187 KB)
    Freely Available from IEEE
  • Awards

    Publication Year: 2008, Page(s):vi - xii
    Request permission for commercial reuse | PDF file iconPDF (1864 KB)
    Freely Available from IEEE
  • Tutorial session

    Publication Year: 2008, Page(s):xiii - xviii
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (255 KB) | HTML iconHTML

    Provides an abstract for each of the presentations and a brief professional biography of each presenter. The complete presentations were not made available for publication as part of the conference proceedings. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Featured plenary speaker

    Publication Year: 2008, Page(s): xix
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (463 KB)

    Provides an abstract of the plenary presentation and a brief professional biography of the presenter. The complete presentation was not made available for publication as part of the conference proceedings. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 2009 joint meeting of the european frequency & time forum and the IEEE international frequency control symposium

    Publication Year: 2008, Page(s): xx
    Request permission for commercial reuse | PDF file iconPDF (80 KB)
    Freely Available from IEEE
  • Table of contents

    Publication Year: 2008, Page(s):xxi - xxxvii
    Request permission for commercial reuse | PDF file iconPDF (182 KB)
    Freely Available from IEEE
  • Author index

    Publication Year: 2008, Page(s):xxxviii - l
    Request permission for commercial reuse | PDF file iconPDF (114 KB)
    Freely Available from IEEE
  • [Copyright notice]

    Publication Year: 2008, Page(s): li
    Request permission for commercial reuse | PDF file iconPDF (407 KB)
    Freely Available from IEEE
  • Harry F. Tiersten memorial session [In Memoriam Harry F. Tiersten, Professor and Ph.D., 1930-2006]

    Publication Year: 2008
    Request permission for commercial reuse | PDF file iconPDF (85 KB) | HTML iconHTML
    Freely Available from IEEE
  • The search for gravitational waves

    Publication Year: 2008, Page(s):1 - 9
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB) | HTML iconHTML

    There has been a significant advance in the sensitivity of broadband searches for gravitational waves, using an international network of kilometer-scale laser interferometers. This network has recently concluded a 22-month search for gravitational waves, covering a frequency range from 50 Hz to several kHz. Sensitivity to strains in space of the order of 10-21 brings a variety of potent... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Several extensions of Mindlin-Gazis’s analysis of rotated Y-cut of quartz (invited)

    Publication Year: 2008, Page(s):10 - 18
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1245 KB) | HTML iconHTML

    Rectangular AT-cut of quartz plate vibrating in the fundamental thickness shear mode is widely used in frequency control and selection. There are numerous spurious responses due to finite dimensions of contour besides of the main desired shear mode. Hence it is important to choose dimensions yielding a good separation between the main mode and spurious modes. Mindlin derived approximate two dimens... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Direct and inverse energy trapping in the thin film resonators and optimization of their designs

    Publication Year: 2008, Page(s):19 - 24
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1795 KB) | HTML iconHTML

    In this communication we consider the application of the Tiersten theory of the energy trapping of the "essentially" thickness modes to thin film resonators using the thickness extensional modes of ZnO and AlN textured films. Considering mainly the applications to filtering, we discuss the conditions allowing obtaining a single mode response, the influence of the shape of the electrodes and of the... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Finite Element Analysis of thickness shear crystals with surface irregularities

    Publication Year: 2008, Page(s):25 - 30
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1061 KB) | HTML iconHTML

    This work is a continuation of an earlier study on drive level dependence (DLD), wherein the resistance of a thickness-shear crystal changes at low drive levels as the drive level changes. The earlier work used a 2-D Finite Element Analysis (FEA) to show that a surface irregularity, such as an attached particle, causes rotational imbalance in the motion of a contoured thickness-shear crystal, whic... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Finite Element Analysis of Lateral Field excited thickness shear sensors

    Publication Year: 2008, Page(s):31 - 34
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (565 KB) | HTML iconHTML

    Lateral field electroded (LFE) sensors have been recently introduced that can study the permittivity and conductivity (electrical properties) of liquids in contact with the surface opposite the electroded side. The unique feature of these sensors is that the response depends in part on changes in the electrical field distribution in the quartz blank due to the electrical properties in the liquid. ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Characterization and modeling of a bulk acoustic wave particle focusing device

    Publication Year: 2008, Page(s):35 - 38
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1029 KB) | HTML iconHTML

    In this paper, we discuss our work in the modeling and characterization of an acoustic-microfluidic focusing device that uses standing bulk acoustic waves to focus particles under flow. Modeling was done using Comsol Multiphysicsreg (Comsol, Los Angeles, CA), a multiphysics FEM tool, and the performance of the device was assessed through coefficient of variance (CV) measurements using a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Wave propagation in an acoustic wave guide sensor for liquids driven by pulsed excitation of surface acoustic waves

    Publication Year: 2008, Page(s):39 - 43
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (816 KB) | HTML iconHTML

    The wave propagation in an acoustic wave guide sensor filled with liquids and driven by pulsed excitation of Lamb waves on glass plates forming the boundaries of the wave guide has been analyzed with respect to the formation of different wave groups in the receiver signal. The results of model calculations of the wave propagation were compared with measured transit times. Evidence is provided for ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Improved sensitivity of TSM sensors using a composite Sensor-Actuator Hybrid Structure (SAHS)

    Publication Year: 2008, Page(s):44 - 49
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (774 KB) | HTML iconHTML

    Thickness shear mode (TSM) sensors are widely employed as biosensors. One of the most important operational parameters of biosensors is their sensitivity. Due to the fact that TSM sensors have maximum sensitivity at the center of the sensing electrode, there has been increased research efforts focused on the development of techniques for controlling the distribution of the measurand over the senso... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Edge effects with liquid droplets deposited on acoustic resonators: Consequences of vortex flow

    Publication Year: 2008, Page(s):50 - 52
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (445 KB) | HTML iconHTML

    For small droplets deposited on the surface of an acoustic thickness shear resonator, the shear motion of the substrate induces vortex flow close the three-phase line. There is a rather strong peak of stress right at the line of contact and a more extended region (comparable in size to the penetration depth) where the surface stress is lower than average. Altogether, the vortices lower the integra... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multi-mode excitation of electromagnetic-acoustic resonant sensor arrays

    Publication Year: 2008, Page(s):53 - 57
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (917 KB) | HTML iconHTML

    Electromagnetic excitation of acoustic sensors as an alternative to piezoelectric and capacitive excitation allows for non-contact measurements and the generation of multiple modes of vibration. It is possible to utilize the same excitation setup to excite flexural, face shear, and thickness shear modes with no changes to the resonator itself. In this contribution we propose a sensor array setup t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optical lattice clocks with non-interacting bosons and fermions

    Publication Year: 2008, Page(s):58 - 64
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1455 KB) | HTML iconHTML

    We discuss configurations of optical lattice clocks from the viewpoint of lattice geometries and quantum statistics of interrogated atoms. This leads to two promising schemes; one-dimensional lattice loaded with spin-polarized fermions and three-dimensional lattice loaded with bosons. These two optical lattice clocks based on fermionic 87Sr and bosonic 88Sr were demonstrated ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optical frequency standard at 1.54 μm based on the HI molecule and Extended Cavity Laser Diode

    Publication Year: 2008, Page(s):65 - 68
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (619 KB) | HTML iconHTML

    We have developed and characterized an original optical frequency standard based on the IR absorption line R(3) of the HI molecule. Accurate FM-spectroscopy of hydrogen iodide was performed by an extended cavity laser diode (ECLD). By the FM sideband technique we achieved absolute frequency stabilization of the ECLD to the absorption line central frequency of 194.536 THz. The novelty of this work ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Long-term frequency aging rate for unpowered space-class oscillators

    Publication Year: 2008, Page(s):69 - 74
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (425 KB) | HTML iconHTML

    The presented data will provide empirical evidence that may be used to estimate the performance of backup, unpowered oscillators for long term space missions, as well as an aid in validating the worst case analyses that are routinely performed on these oscillators. An essential component of any space vehicle is the onboard master oscillator and the proper operation of the entire payload is depende... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The reflectometer-an indispensable instrument for eliminating frequency jumps and noise in precision crystal oscillators

    Publication Year: 2008, Page(s):75 - 78
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (587 KB) | HTML iconHTML

    An instrument that is able to identify a noisy quartz crystal or to cull out crystals that will produce frequency jumps before assembling into finished precision ovenized oscillators is continuously sought by industry. Noise and frequency jumps are phenomena exhibited in finished oscillators which can be caused by the quartz crystal; but can also be caused by popcorn noise in regulators, transisto... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Noise measurements beyond the standard thermal noise limit

    Publication Year: 2008, Page(s):79 - 80
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB) | HTML iconHTML

    We demonstrated the possibility of "real time" noise measurements at microwave frequencies with spectral resolution ~ 8 dB below the standard thermal noise limit. This was achieved by combining the principles of microwave circuit interferometry with signal recycling and minimizing the influence of various technical noise sources on the measurement processes. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.