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High precision measurements using high frequency gigahertz signals

Jin, Aohan; Fu, Siyuan; Sakurai, Atsunori LU ; Liu, Liang LU ; Edman, Fredrik LU ; Pullerits, Tönu LU ; Öwall, Viktor LU and Karki, Khadga Jung LU (2014) In Review of Scientific Instruments 85(12).
Abstract
Generalized lock-in amplifiers use digital cavities with Q-factors as high as 5 × 108 to measure signals with very high precision. In this Note, we show that generalized lock-in amplifiers can be used to analyze microwave (giga-hertz) signals with a precision of few tens of hertz. We propose that the physical changes in the medium of propagation can be measured precisely by the ultra-high precision measurement of the signal. We provide evidence to our proposition by verifying the Newton's law of cooling by measuring the effect of change in temperature on the phase and amplitude of the signals propagating through two calibrated cables. The technique could be used to precisely measure different physical properties of the propagation medium,... (More)
Generalized lock-in amplifiers use digital cavities with Q-factors as high as 5 × 108 to measure signals with very high precision. In this Note, we show that generalized lock-in amplifiers can be used to analyze microwave (giga-hertz) signals with a precision of few tens of hertz. We propose that the physical changes in the medium of propagation can be measured precisely by the ultra-high precision measurement of the signal. We provide evidence to our proposition by verifying the Newton's law of cooling by measuring the effect of change in temperature on the phase and amplitude of the signals propagating through two calibrated cables. The technique could be used to precisely measure different physical properties of the propagation medium, for example, the change in length, resistance, etc. Real time implementation of the technique can open up new methodologies of in situ virtual metrology in material design. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Review of Scientific Instruments
volume
85
issue
12
publisher
American Institute of Physics
external identifiers
  • pmid:25554338
  • wos:000347168500075
  • scopus:84916215288
ISSN
1089-7623
DOI
10.1063/1.4903461
language
English
LU publication?
yes
id
dea0c065-1cf9-4e60-bb03-5cf23545c950 (old id 4861985)
date added to LUP
2014-12-12 12:36:02
date last changed
2017-01-01 06:17:21
@article{dea0c065-1cf9-4e60-bb03-5cf23545c950,
  abstract     = {Generalized lock-in amplifiers use digital cavities with Q-factors as high as 5 × 108 to measure signals with very high precision. In this Note, we show that generalized lock-in amplifiers can be used to analyze microwave (giga-hertz) signals with a precision of few tens of hertz. We propose that the physical changes in the medium of propagation can be measured precisely by the ultra-high precision measurement of the signal. We provide evidence to our proposition by verifying the Newton's law of cooling by measuring the effect of change in temperature on the phase and amplitude of the signals propagating through two calibrated cables. The technique could be used to precisely measure different physical properties of the propagation medium, for example, the change in length, resistance, etc. Real time implementation of the technique can open up new methodologies of in situ virtual metrology in material design.},
  articleno    = {126102},
  author       = {Jin, Aohan and Fu, Siyuan and Sakurai, Atsunori and Liu, Liang and Edman, Fredrik and Pullerits, Tönu and Öwall, Viktor and Karki, Khadga Jung},
  issn         = {1089-7623},
  language     = {eng},
  number       = {12},
  publisher    = {American Institute of Physics},
  series       = {Review of Scientific Instruments},
  title        = {High precision measurements using high frequency gigahertz signals},
  url          = {http://dx.doi.org/10.1063/1.4903461},
  volume       = {85},
  year         = {2014},
}