Relevant bibliographies by topics / Electric resonators. Perturbation

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Academic literature on the topic 'Electric resonators. Perturbation'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Electric resonators. Perturbation"

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Saleem, Muhammad Mubasher, Shayaan Saghir, Syed Ali Raza Bukhari, Amir Hamza, Rana Iqtidar Shakoor, and Shafaat Ahmed Bazaz. "A Low-g MEMS Accelerometer with High Sensitivity, Low Nonlinearity and Large Dynamic Range Based on Mode-Localization of 3-DoF Weakly Coupled Resonators." Micromachines 12, no. 3 (March 16, 2021): 310. http://dx.doi.org/10.3390/mi12030310.

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This paper presents a new design of microelectromechanical systems (MEMS) based low-g accelerometer utilizing mode-localization effect in the three degree-of-freedom (3-DoF) weakly coupled MEMS resonators. Two sets of the 3-DoF mechanically coupled resonators are used on either side of the single proof mass and difference in the amplitude ratio of two resonator sets is considered as an output metric for the input acceleration measurement. The proof mass is electrostatically coupled to the perturbation resonators and for the sensitivity and input dynamic range tuning of MEMS accelerometer, electrostatic electrodes are used with each resonator in two sets of 3-DoF coupled resonators. The MEMS accelerometer is designed considering the foundry process constraints of silicon-on-insulator multi-user MEMS processes (SOIMUMPs). The performance of the MEMS accelerometer is analyzed through finite-element-method (FEM) based simulations. The sensitivity of the MEMS accelerometer in terms of amplitude ratio difference is obtained as 10.61/g for an input acceleration range of ±2 g with thermomechanical noise based resolution of 0.22 μμg/Hz and nonlinearity less than 0.5%.
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Perello-Roig, Rafel, Jaume Verd, Sebastià Bota, and Jaume Segura. "Impact of Fluid Flow on CMOS-MEMS Resonators Oriented to Gas Sensing." Sensors 20, no. 17 (August 19, 2020): 4663. http://dx.doi.org/10.3390/s20174663.

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Based on experimental data, this paper thoroughly investigates the impact of a gas fluid flow on the behavior of a MEMS resonator specifically oriented to gas sensing. It is demonstrated that the gas stream action itself modifies the device resonance frequency in a way that depends on the resonator clamp shape with a corresponding non-negligible impact on the gravimetric sensor resolution. Results indicate that such an effect must be accounted when designing MEMS resonators with potential applications in the detection of volatile organic compounds (VOCs). In addition, the impact of thermal perturbations was also investigated. Two types of four-anchored CMOS-MEMS plate resonators were designed and fabricated: one with straight anchors, while the other was sustained through folded flexure clamps. The mechanical structures were monolithically integrated together with an embedded readout amplifier to operate as a self-sustained fully integrated oscillator on a commercial CMOS technology, featuring low-cost batch production and easy integration. The folded flexure anchor resonator provided a flow impact reduction of 5× compared to the straight anchor resonator, while the temperature sensitivity was enhanced to −115 ppm/°C, an outstanding result compared to the −2403 ppm/°C measured for the straight anchored structure.
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Meyne, Nora, and Arne F. Jacob. "Sectorial substrate-integrated half-mode near-field sensors for biological liquid characterization." International Journal of Microwave and Wireless Technologies 6, no. 3-4 (April 1, 2014): 305–12. http://dx.doi.org/10.1017/s1759078714000385.

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Two compact resonant near-field sensors are introduced for the characterization of aqueous solutions at 5 GHz. They are based on folded substrate-integrate circular half-mode resonators with a planar sensing tip. Owing to the planar design, the sensor is simple and cheap to manufacture, and a sample can be easily coupled to the resonator from the top. The operating principle of the sensor is explained and verified by both simulation and measurement. The radiation of the sensors is quantified by means of a quality factor analysis. Finally, a previously introduced calibration method based on the perturbation theory is applied to the sensors and its accuracy is improved by choosing more suitable reference materials.
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Paredes, F., G. Zamora, S. Zufanelli, F. J. Herraiz-Martínez, J. Bonache, and F. Martín. "Recent Advances in Multiband Printed Antennas Based on Metamaterial Loading." Advances in OptoElectronics 2012 (October 22, 2012): 1–12. http://dx.doi.org/10.1155/2012/968780.

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It is shown that printed antennas loaded with metamaterial resonators can be designed to exhibit multiband functionality. Two different antenna types and metamaterial loading are considered: (i) printed dipoles or monopoles loaded with open complementary split ring resonators (OCSRRs) and (ii) meander line or folded dipole antennas loaded with split ring resonators (SRRs) or spiral resonators (SRs). In the first case, multiband operation is achieved by series connecting one or more OCSRRs within the dipole/monopole. Such resonators force opens at their positions, and by locating them at a quarter wavelength (at the required operating frequencies) from the feeding point, it is possible to achieve multiple radiation bands. In the second case, dual-band functionality is achieved through the perturbation of the antenna characteristics caused by the presence of the metamaterial resonators. This latter strategy is specially suited to achieve conjugate matching between the antenna and the chip in radiofrequency identification (RFID) tags at two of the regulated UHF-RFID bands.
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Wahhab, Ahmed Adnan, Ali A. Abduljabar, and Hayder Jawad Albattat. "Microstrip Stopband Split Ring Resonator For Microwave Microfluidic Sensing." Al-Qadisiyah Journal for Engineering Sciences 13, no. 2 (May 26, 2020): 74–79. http://dx.doi.org/10.30772/qjes.v13i2.632.

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Stopband split ring resonator (SSRR) is presented in this paper for measuring complex permittivity of liquid with different position of microfluidic channel operates at resonant frequency of 1 GHz. The sensor was fabricated and microfluidic channel is located in the gap groove with two different positions of the carrier where the electric field is as large as possible. The sensor has been tested with several solvents to verify its sensitivity where the electric field interacts with the liquid filled in a quartz tube and hence alter the SRR behavior. The electromagnetic properties (complex permittivity) of the solvent can be extracted from shift in the resonant frequency of the resonator due to perturbation phenomenon.
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Shu, Y., and T. Y. Wong. "Perturbation of dielectric resonator for material measurement." Electronics Letters 31, no. 9 (1995): 704. http://dx.doi.org/10.1049/el:19950511.

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Yuan, Jie, and Xingwu Long. "Optical-axis perturbation in nonplanar ring resonators." Optics Communications 281, no. 5 (March 2008): 1204–10. http://dx.doi.org/10.1016/j.optcom.2007.10.058.

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Steiner, Carsten, Stefanie Walter, Vladimir Malashchuk, Gunter Hagen, Iurii Kogut, Holger Fritze, and Ralf Moos. "Determination of the Dielectric Properties of Storage Materials for Exhaust Gas Aftertreatment Using the Microwave Cavity Perturbation Method." Sensors 20, no. 21 (October 23, 2020): 6024. http://dx.doi.org/10.3390/s20216024.

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Recently, a laboratory setup for microwave-based characterization of powder samples at elevated temperatures and different gas atmospheres was presented. The setup is particularly interesting for operando investigations on typical materials for exhaust gas aftertreatment. By using the microwave cavity perturbation method, where the powder is placed inside a cavity resonator, the change of the resonant properties provides information about changes in the dielectric properties of the sample. However, determining the exact complex permittivity of the powder samples is not simple. Up to now, a simplified microwave cavity perturbation theory had been applied to estimate the bulk properties of the powders. In this study, an extended approach is presented which allows to determine the dielectric properties of the powder materials more correctly. It accounts for the electric field distribution in the resonator, the depolarization of the sample and the effect of the powder filling. The individual method combines findings from simulations and recognized analytical approaches and can be used for investigations on a wide range of materials and sample geometries. This work provides a more accurate evaluation of the dielectric powder properties and has the potential to enhance the understanding of the microwave behavior of storage materials for exhaust gas aftertreatment, especially with regard to the application of microwave-based catalyst state diagnosis.
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Ladvanszky, Janos. "Stability investigations based on two-port describing functions." Circuit World 45, no. 2 (May 7, 2019): 65–79. http://dx.doi.org/10.1108/cw-12-2018-0105.

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Purpose Stability of a nonlinear, tuned amplifier has been investigated based on the describing function method. On stability, this paper means global asymptotic stability. The tuned amplifier comprises a saturated amplifying device with feedback and two resonators, at the input and the output. Describing function method here means introduction of the two-port describing functions. Design/methodology/approach Describing function method is applied, extended for two ports. Results from complex analysis and matrix algebra are heavily used. The two resonators have identical resonant frequency and bandwidth. Instability is represented by non-vanishing output perturbation for zero-input perturbation. Applying a simple transistor model with saturation and feedback, stability is analyzed in the form of output voltage as a function of input voltage. Findings Two-port scattering and admittance describing functions have been introduced. At a certain input voltage amplitude, instability appears in the form of unwanted sidebands, then at a higher input voltage, instability disappears, in good agreement with experiments. The hand calculated stability limits are in good agreement with the computer analysis. Originality/value The paper is based on an early publication of the author (Baranyi and Ladvánszky, 1984). Here, the full material is presented, explained step by step, extended and revised. All neglections that were earlier made in the author’s paper have been avoided here. This paper has significant tutorial value as well.
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Raveendranath, U., J. Jacob, and K. T. Mathew. "Complex permittivity measurement of liquids with coaxial cavity resonators using a perturbation technique." Electronics Letters 32, no. 11 (1996): 988. http://dx.doi.org/10.1049/el:19960674.

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Dissertations / Theses on the topic "Electric resonators. Perturbation"

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Li, Xiang, and Yan Jiang. "Design of a Cylindrical Cavity Resonator for Measurements of Electrical Properties of Dielectric Materials." Thesis, Högskolan i Gävle, Avdelningen för elektronik, matematik och naturvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-7687.

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In microwave communications, the main aspects for affecting the dielectric losses in the materials are relating to the dielectric properties and the radiation frequencies. Normally, the different dielectric materials will lead to the different losses and reflections for microwave frequencies. To evaluate the dielectric properties from the different materials plays an essential role in the microwave engineering. There are many approaches can be used to measure the dielectric materials, e.g. capacitor methods, transmission line methods, cavity resonator methods, open cavity methods and so on. The cavity resonator method is one of the most popular ways for measuring the dielectric materials. In this thesis, some of the techniques will be reviewed, and the TM010 mode cylindrical cavity resonator with perturbation technique will be used for determining the dielectric properties. The design and measurements will be presented in both simulations and practice. With 1.2GHz cavity resonator, in the simulations, the dielectric permittivity for Teflon is measured as 2.09-0.0023i and 2.12-0.0116 in copper cavity and ferromagnetic cavity. Finally the sample is measured as 3.83-0.12i in practice.
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Conference papers on the topic "Electric resonators. Perturbation"

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Ghaderi, Pooya, and Andrew J. Dick. "Parametric Resonance Based Piezoelectric Micro-Scale Resonators: Modeling and Theoretical Analysis." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47506.

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In this study, a two-component auto-parametric resonator utilizing piezoelectric actuation is proposed. The resonator consists of a plate component which serves as the exciter and a beam component which serves as the oscillator. When an electric signal is applied, the plate component experiences in-plane oscillations which serve to provide axial excitation to the beam component. The system is designed to operate in auto-parametric resonance with a plate to beam principal frequency ratio of 1:2. Due to the oscillations of the beam component, a dynamic force and a moment are applied to the plate and can cause out-of-plane oscillations of the plate component. Internal-resonance can also exist between the beam oscillations and the out-of-plane vibrations of the plate component. A model is derived in order to describe these three motions and the coupling between them. By assuming single mode behavior for each motion, the model is discretized and represented with a three degree-of-freedom model. The model is solved analytically by using the method of multiple scales. Results of the perturbation method agree well with the numerical simulation. The results for the system with strong and weak coupling between the resonator components are presented and compared.
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Strachan, B. Scott, and Steven Shaw. "Subharmonic Resonance Cascades in a Class of Coupled Resonators." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48599.

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We consider a chain of N nonlinear resonators with natural frequency ratios of approximately 2:1 along the chain and weak nonlinear coupling of a form that allows energy to flow between resonators. Specifically, the coupling is such that the response of one resonator parametrically excites the next resonator in the chain, and also creates a resonant backaction on the previous resonator in the chain. This class of systems, which is being proposed for micro-electro-mechanical frequency dividers, is shown to have rich dynamical behavior. Of particular interest is the case when the high frequency end of the chain is resonantly excited, and coupling results in the potential for a cascade of sub-harmonic bifurcations down the chain. When the entire chain is activated, that is, when all N resonators have non-zero amplitudes, if the input frequency on the first resonator is Ω, then the terminal resonator responds with frequency Ω/2N. The details of the activation depend on the strength and frequency of the input, the level of resonator dissipation, and the mistuning in the chain. In this paper we present analytical results, based on perturbation methods, which provide useful predictions about these responses in terms of system and input parameters. Parameter conditions for activation of the entire chain are derived, along with results about other phenomena, such as bistability and partial activation of the chain. We demonstrate the utility of the predictive results by direct comparison with simulations of the equations of motion, and we also present samples of mechanical and electromechanical systems that realize the desired properties. These results will be useful for the design and operation of mechanical frequency dividers based on subharmonic resonances.
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Miao, Min, Jingpeng Bu, Liwei Zhao, Yufeng Jin, and Yangfei Zhang. "A Bulk Micromachined Tunable Dual-Mode Microwave Bandpass Filter on Coplanar Waveguide." In 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2008. http://dx.doi.org/10.1115/micronano2008-70023.

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This paper proposes a bulk micromachined bandpass filter on 0.5mm-thick Pyrex glass, whose operation is based on the splitting of the odd and even degenerate mode in a dual-mode resonator, with the addition of a perturbation element. In such a way, a filter may require only half resonators of a traditional one, resulting in a more compact configuration over those ever reported. A 4%-bandwidth bandpass filter centered at 17GHz was designed. The square-ring-like coplanar waveguide (CPW) act as a dual-mode resonator, and an open-circuited stub attached to the inner corner of the square-ring acts as the perturbation element and dominates the filter bandwidth. The two bulk-micromachined switches for tuning are placed symmetrically along the diagonal line. Since the electrical length of CPW is extended after being loaded by capacitive switches, both the degenerate resonating frequencies and the filter mid-band frequency are shifted downward. Theoretical formulas are derived for various actuation states of all the switches. The filter performance is analysed also using finite-element fullwave tools. A frequency shift of 0.6GHz is seen which is close to 0.58GHz obtained from analytical solutions. Both the original and tuned state come with satisfying microwave performance, i.e. low passband insertion-loss (< 0.5dB) and return-loss (< −15dB) and high stopband rejection. It is also shown that the simulated result is in good agreement with theoretical solutions. The bulk microfabrication is shown to be much simpler than surface micromachining conventionally used for RF MEMS switches. Since the bridge skeleton is Si, thermal mismatch between all-metal bridge and dielectric substrate is avoided, and reliability at elevated temperature is guaranteed or at least greatly improved. Besides, the p++ doped Si line patterned simultaneously with the microbridges, can also be used as a DC biasing resistor, which can eliminate the additional steps to fabricate the resistive alloy line. The tested results of the fabricated switch samples are also shown. The device may be a good candidate for novel Ku-band inter-scientific satellite communication or wireless networking.
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Zhang, Jun, Jie Cao, Yao Li, Chutian Huang, and Kun Wang. "A Quantitative Study of Crack Monitoring for Electromagnetic Resonators by Perturbation Method." In 2020 IEEE 3rd International Conference on Electronic Information and Communication Technology (ICEICT). IEEE, 2020. http://dx.doi.org/10.1109/iceict51264.2020.9334224.

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Hajhashemi, M. S., and B. Bahreyni. "Analytic model for perturbation analysis in coupled resonator system for electronic nose applications." In TRANSDUCERS 2011 - 2011 16th International Solid-State Sensors, Actuators and Microsystems Conference. IEEE, 2011. http://dx.doi.org/10.1109/transducers.2011.5969602.

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Arjmand, Ehsan, Siamak Arzanpour, and Behraad Bahreyni. "Analysis of Mechanical Nonlinearities of a Micro-Beam in Longitudinal Mode." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-40493.

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Micro electrical mechanical systems inherently tend to behave nonlinearly in high power handling. Such nonlinearities arise from mechanical and electrical characteristics of the systems. In this study, the mechanical nonlinearities are focused and the longitudinal mode shape of a microbeam resonator with high quality factor is considered. The mechanical nonlinearities for this system are assumed to be cubic and quadratic. the method of multiple scale is used for perturbation analysis which leads us to obtain the function of displacement with respect to frequency which is beneficial to set an upper dynamic limit to avoid instability and, also, facilitates to make the system so-called almost linear.
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Mahmoudian, N., M. Rastgaar Aagaah, G. Nakhaie Jazar, and M. Mahinfalah. "Time Response Dynamics of Linear Model of Microcantilever-MEMS." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84521.

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This paper presents analytic derivation of dynamic behavior of a liniearized micro-electro-mechanical resonator. The parametric oscillation results from a displacement-dependent electrostatic force generated by oscillation of a microbeam. The utilized device is a MEMS with a time-varying capacitor. The stability and steady state dynamic behavior of the MEMS has been analyzed without polarization voltage. The main characteristic of the no-polarization model is effects of parameters in stability of the system. A set of stability charts is provided for prediction of the boundary between the stable and unstable domains for the principal resonance. Applying perturbation method, analytical equations are derived to describe both the steady state and time response of the system.
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Chen, Dongyang, Jiuxuan Zhao, Yinshen Wang, and Jin Xie. "Electrostatic charge sensor based on micro resonator with sensing scheme of effective stiffness perturbation." In 2017 IEEE 30th International Conference on Micro Electro Mechanical Systems (MEMS). IEEE, 2017. http://dx.doi.org/10.1109/memsys.2017.7863633.

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Nakhaie Jazar, G., M. Mahinfalah, M. R. Aagaah, N. Mahmoudian, A. Khazaei, and M. H. Alimi. "Mathematical Modeling of Thermal Effects in Steady State Dynamics of Microresonators Using Lorentzian Function: Part 1 — Thermal Damping." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81837.

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Mathematical modeling of thermal effects on steady state dynamics of microresonators, utilizing an analytical approach is studied. Thermal phenomena has two distinct effects, which in this report are called, thermal damping and temperature relaxation. In this part of a two-part report we investigate the thermal damping and its effects on microresonator dynamics. To do this, first the reduced order mathematical model of the system is introduced as a forced mass-spring-damper system, and then a linearized model of electric actuated microbeam resonator is employed. The effect of thermal damping is modeled as an increase in damping rate, utilizing a Lorentzian function of excitation frequency. The steady state frequency-amplitude dependency of the system will be derived utilizing averaging perturbation method. The developed analytic equation describing the frequency response of the system around resonance can be utilized to explain the dynamics of the system, as well as design of dynamic parameters. However, we have focused on exploration of thermal damping.
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