Influence of Ferromagnetic Ribbon Width on Q Factor and Magnetoelastic Resonance Frequency

<p>This paper presents a single port rectangular ring resonator sensor for material characterizations. The proposed sensor is designed at operating resonance frequency of 4 GHz. The sensor consists of micro-strip transmission line and ring resonator with applying the enhancement method to the coupling gaps. The using of enhancement method is to improve the return loss of the sensor and sensitivity in terms of Q-factor, respectively. Furthermore, the proposed sensor is designed and fabricated on Roger 5880 substrate. Standard materials with known permittivity have been used in order to validate the sensor’s sensitivity. Based on the results, the percentage of error for the proposed rectangular sensor is 0.2% to 8%. It can be demonstrated that the proposed sensor will be useful for various applications such as medicine, bio-sensing and food industry.</p>

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A highly accurate measurement of resonator Q-factor and resonance frequency

Review of Scientific Instruments ◽

10.1063/1.5050592 ◽

2018 ◽

Vol 89 (11) ◽

pp. 113903 ◽

Cited By ~ 4

Author(s):

B. Gyüre-Garami ◽

O. Sági ◽

B. G. Márkus ◽

F. Simon

Keyword(s):

Resonance Frequency ◽

Q Factor

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Research of a Novel Combined Metal-Fused Silica Resonator for Cylinder Shell Vibrating Gyroscopes

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.516.443 ◽

2012 ◽

Vol 516 ◽

pp. 443-446

Author(s):

Yu Lie Wu ◽

Qing Lei Luan ◽

Hong Juan Cui ◽

Xiao Mei Wu ◽

Xiang Xi

Keyword(s):

Structural Optimization ◽

Resonance Frequency ◽

Optimization Design ◽

Low Cost ◽

High Accuracy ◽

Fused Silica ◽

Cylinder Wall ◽

The Novel ◽

Q Factor ◽

The Stability

A novel combined metal-fused silica resonator for the cylinder vibrating gyroscope is proposed in this paper. The cylinder wall of the resonator is made of fused silica, while the bottom is made of metal, and then the two parts are connected by strong glue. With this method, the manufacturing difficulty of the fused silica resonator can be reduced significantly and the performance can be retained without remarkable degeneration. In this paper, the novel metal-fused silica resonator is analyzed, including the structural optimization design and fabrication, testing of the stability of the resonance frequency and the Q factor. The preliminary experimental results show that the low-cost combined metal-fused silica resonator has potential good performance to achieve high accuracy in a cylinder shell vibrating gyroscope.

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Microfabricated, Wireless, Magnetoelastic Micro-Particles for the Detection of Bacillus Anthracis Spores

MRS Proceedings ◽

10.1557/proc-0951-e06-31 ◽

2006 ◽

Vol 951 ◽

Author(s):

Jiehui Wan ◽

Michael L. Johnson ◽

Huihua Shu ◽

Valery A. Petrenko ◽

Bryan A. Chin

Keyword(s):

Resonance Frequency ◽

Bacillus Anthracis ◽

Biomolecular Recognition ◽

Sensor Surface ◽

Recognition Element ◽

Specific Phage ◽

Micro Particles ◽

Bacillus Anthracis Spores ◽

Molecular Recognition Element ◽

Magnetoelastic Resonance

ABSTRACTMagnetoelastic resonance biosensors were fabricated by immobilizing a bio-molecular recognition element onto the surface of Fe79B21 magnetoelastic particles (MEP). These sensors can be measured wirelessly and remotely for both in-air and in-liquid bacteria detection. Filamentous bacterio-phage that was selected specifically for the detection of Bacillus anthracis spores was employed as the biomolecular recognition element and immobilized onto the MEPs' surfaces. Attachment of the spores to the sensor surface due to specific phage-spore binding results in a shift in the resonance frequency of the biosensor. Insitu measurement of the resonance frequency of biosensors of 5×100×500 microns were used to determine the sensor response as a function of spore concentrations of 103 to 108 cfu/ml. Specificity of the sensor was evaluated by conducting tests using a mixture of Bacillus anthracis Sterne strain, Bacillus cereus and Bacillus megaterium spores.

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High Frequency FM MEMS Accelerometer Using Piezoresistive Resonators

Proceedings ◽

10.3390/proceedings2131048 ◽

2018 ◽

Vol 2 (13) ◽

pp. 1048

Author(s):

Cláudia Coelho ◽

João Gaspar ◽

Luís A. Rocha

Keyword(s):

Resonance Frequency ◽

High Frequency ◽

Output Signal ◽

Bias Current ◽

Q Factor ◽

Device Layer ◽

Mems Accelerometer ◽

High Resonance Frequency ◽

Double Mass ◽

Soi Technology

A novel frequency modulated (FM) accelerometer based on piezoresistive resonators is presented. The accelerometer uses two differential resonators, connected to the accelerometer proofmass by an amplifying leverage mechanism. The piezoresistive double-mass resonators are electrostatically driven in anti-phase and the output signal is measured piezoresistively by applying a bias current to the connecting microbeam of the double-mass resonators. Accelerometers were fabricated using SOI technology with a 5 µm device layer. Fabricated resonators show a high resonance frequency around 705 kHz and a Q-factor close to 20,000 when measured in vacuum. Preliminary measurements show a sensitivity around 0.46 Hz/g for a single resonator.

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