Accuracy of microwave cavity perturbation measurements

Carter, Richard G.

doi:10.1109/22.920149

Cited by 135 publications

(54 citation statements)

References 4 publications

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“…Note that this analysis assumes the capillary occupies a uniform field and, as such, cannot be applied to any SRR with extended conductors formed from circular cross-section wire. It is useful to plot changes in center frequency and inverse quality factor with respect to polarisability as calculated by (12) and (15) in order to see whether (15) accounts for capillary depolarization, as shown in Fig. 10.…”

Section: Resultsmentioning

confidence: 99%

Improved Split-Ring Resonator for Microfluidic Sensing

Rowe

al-Malki

Abduljabar

et al. 2014

IEEE Trans. Microwave Theory Techn.

105

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Abstract-We present a method of making low loss split-ring resonators for microfluidic sensing at microwave frequencies using silver coated copper wire. We show that a simple geometric modification and the use of square cross-section wire give greater electric field confinement in the capacitive region of the resonant sensor. We use a combination of theoretical analysis, finite element simulations and empirical measurements to demonstrate the subsequent increases in the sensitivity of these split ring resonators for complex permittivity measurements of some common solvents.

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Section: Resultsmentioning

confidence: 99%

Improved Split-Ring Resonator for Microfluidic Sensing

Rowe

al-Malki

Abduljabar

et al. 2014

IEEE Trans. Microwave Theory Techn.

105

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“…The cavity perturbation technique was widely adopted for microwave dielectric properties measurements, which is based on the fact that cavities are high quality resonance structures [36]. The reduction of ilmenite concentrates by microwave heating was carried out as follows: the particle size was 180-200 mesh; the reduction temperature was 850-1200 • C; the reduction time was 1.5 h; the additive of sodium silicate was 5%; the reduction agent was coke.…”

Section: Measuring Principles Of Microwave Absorbing Characteristicsmentioning

confidence: 99%

Section: Measuring Principles Of Microwave Absorbing Characteristicsmentioning

confidence: 99%

Microwave-Absorbing Characteristics and XRD Characterization of Magnetic Separation Products of Reductive Products of Ilmenite Concentrate

Wang

Zhang

et al. 2016

Minerals

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Abstract:The microwave absorbing characteristics of magnetic separation products (magnetic and non-magnetic) of reductive products of ilmenite concentrate were measured by the method of microwave cavity perturbation and the magnetic separation products were characterized by X-Ray Diffraction (XRD). It was demonstrated that metallic iron was a strong microwave absorbing material, while TiO 2 was a weak microwave absorbing material. The decrease of a strong microwave absorbing material and an increase of weak microwave absorbing material resulted in the great decrease of microwave absorbing characteristics of magnetic products by using a current intensity from 2.5 to 3.0 A. FeTi 2 O 5 was a strong microwave absorbing material, the increasing content would lead to the significant increase of the microwave absorbing characteristics of non-magnetic products by using a current intensity from 2.0 to 4.0 A. The conclusions could help us to optimize the ilmenite concentrate processing by microwaves and microwave cavity design.

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“…If the rod is aligned parallel to the electric field and inserted inside the cavity, the frequency shift is [6] ( ) …”

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confidence: 99%

Performance of the resonant Schottky pickup at CSRe

Zang

Nolden

et al. 2013

Nuclear Instruments and Methods in Physics Research Section B:

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For a bunched beam, the signals on pickups are coherent, providing a signal power proportional to the square of the number of particles. For a coasting beam the individual particle signals have a random phase; therefore, the overall signal is proportional to the particle number N. As a consequence, Schottky signals are often relatively weak and have to compete with many noise sources. For a small number of particles, the S/N is always a problem. To achieve a high signal-to-noise ratio and better temporal resolution, which could yield important physical information about fast processes, a resonant pickup was developed at GSI [1] , and a similar device is now installed in the CSRe [2] at IMP. This device will be used for nuclear mass and lifetime measurement, as well as other uses. The final goal of the pickup is to detect single particles. In Dec 2012, we performed an experiment with a 112 Sn 50+ beam with an energy of 253 MeV/u, and the single particle sensitivity of the pickup was successfully confirmed. This paper presents hardware measurements of the pickup as well as beam measurements. ____________________________________________________________________________ Performance of the Resonant Schottky pickup at CSRe AbstractFor a bunched beam, the signals on pickups are coherent, providing a signal power proportional to the square of the number of particles. For a coasting beam the individual particle signals have a random phase; therefore, the overall signal is proportional to the particle number N. As a consequence, Schottky signals are often relatively weak and have to compete with many noise sources. For a small number of particles, the S/N is always a problem.To achieve a high signal-to-noise ratio and better temporal resolution, which could yield important physical information about fast processes, a resonant pickup was developed at GSI [1] , and a similar device is now installed in the CSRe [2] at IMP. This device will be used for nuclear mass and lifetime measurement, as well as other uses.The final goal of the pickup is to detect single particles. In Dec 2012, we performed an experiment with a 112 Sn 50+beam with an energy of 253 MeV/u, and the single particle sensitivity of the pickup was successfully confirmed.This paper presents hardware measurements of the pickup as well as beam measurements.

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Accuracy of microwave cavity perturbation measurements

Cited by 135 publications

References 4 publications

Improved Split-Ring Resonator for Microfluidic Sensing

Improved Split-Ring Resonator for Microfluidic Sensing

Microwave-Absorbing Characteristics and XRD Characterization of Magnetic Separation Products of Reductive Products of Ilmenite Concentrate

Performance of the resonant Schottky pickup at CSRe

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