Note: High precision measurements using high frequency gigahertz signals

Aohan Jin; Siyuan Fu; Atsunori Sakurai; Liang Liu; Fredrik Edman; Tõnu Pullerits; Viktor Öwall; Khadga Jung Karki

doi:10.1063/1.4903461

Note: High precision measurements using high frequency gigahertz signals

Aohan Jin^*, Siyuan Fu, Atsunori Sakurai, Liang Liu, Fredrik Edman, Tõnu Pullerits, Viktor Öwall, Khadga Jung Karki

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

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.

Original language	English
Article number	126102
Journal	Review of Scientific Instruments
Volume	85
Issue number	12
DOIs	https://doi.org/10.1063/1.4903461
State	Published - 1 Dec 2014
Externally published	Yes

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title = "Note: High precision measurements using high frequency gigahertz signals",

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.",

author = "Aohan Jin and Siyuan Fu and Atsunori Sakurai and Liang Liu and Fredrik Edman and T{\~o}nu Pullerits and Viktor {\"O}wall and Karki, {Khadga Jung}",

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AU - Jin, Aohan

AU - Fu, Siyuan

AU - Sakurai, Atsunori

AU - Liu, Liang

AU - Edman, Fredrik

AU - Pullerits, Tõnu

AU - Öwall, Viktor

AU - Karki, Khadga Jung

PY - 2014/12/1

Y1 - 2014/12/1

N2 - 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.

AB - 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.

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Note: High precision measurements using high frequency gigahertz signals

Abstract

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