Results 251 to 260 of about 3,838,312 (316)
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4E-3 Spurious Mode Suppression in BAW Resonators
2006 IEEE Ultrasonics Symposium, 2006Designing bulk acoustic wave resonators for RF filter applications is governed by the need for a high quality factor (Q-value), a large piezoelectric coupling and the purity of the main resonance. The most powerful method to suppress spurious modes is terminating the edges of the resonators by a specific border region with a different eigenresonance ...
R. Thalhammer +3 more
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Spurious mode suppression via apodization for 1 GHz AlN Contour-Mode Resonators
2012 IEEE International Frequency Control Symposium Proceedings, 2012This paper reports, for the first time, on the application of apodization techniques to 1 GHz MEMS AlN Contour-Mode Resonators (CMRs [1]) to efficiently suppress spurious modes in close proximity of the main mechanical resonance. This concept has been applied with excellent results to a variety of one port resonators formed by patterned top electrodes ...
Marco Giovannini +3 more
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Eradication of asymmetric spurious modes in AlN MEMS resonators using mode conversion
2016 IEEE 29th International Conference on Micro Electro Mechanical Systems (MEMS), 2016This papers reports on a spurious mode suppression technique that converts the asymmetrical (A0) mode to the intended symmetrical (S0) mode vibrations by installing a notch in aluminum nitride (AlN) laterally vibrating resonators. The technique has been experimentally validated to simultaneously eradicate the A0 spurious mode and enhance the S0 mode ...
Anming Gao, Yansong Yang, Songbin Gong
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Wideband Surface Acoustic Wave Filter at 3.7 GHz With Spurious Mode Mitigation
IEEE transactions on microwave theory and techniques, 2023As an essential functional block in radio frequency (RF) front-ends, surface acoustic wave (SAW) filters with large fractional bandwidth (FBW), high center frequency ( $f_{c}$ ), and low loss are highly sought-after in 5G new radio (NR).
Rongxuan Su +9 more
semanticscholar +1 more source
Japanese Journal of Applied Physics, 2021
Four types of waveforms of AC poling (ACP) and DC poling (DCP) were applied on [001]-oriented 0.72Pb(Mg1/3Nb2/3)O3-0.28PbTiO3 (PMN-28PT) ferroelectric single crystals (SCs) at 80 °C.
Yiqin Sun +4 more
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Four types of waveforms of AC poling (ACP) and DC poling (DCP) were applied on [001]-oriented 0.72Pb(Mg1/3Nb2/3)O3-0.28PbTiO3 (PMN-28PT) ferroelectric single crystals (SCs) at 80 °C.
Yiqin Sun +4 more
semanticscholar +1 more source
Spurious mode distinguish by modal response contribution index in eigensystem realization algorithm
Structural Design of Tall and Special Buildings, 2018C. Qu, Darren Mei, T. Yi, Hongnan Li
semanticscholar +3 more sources
Triple-Mode Ceramic Cavity Filters With Wide Spurious-Free Performance
IEEE Transactions on Microwave Theory and Techniques, 2017D. Hendry, A. Abbosh
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Transition section spurious mode program
Proceedings of the Institution of Electrical Engineers, 1976A transition section spurious mode program is presented to calculate the magnitude and phase of propagating modes in H-plane waveguide transition sections with large flare angles. This program is based on a full wave analysis which employs local radial waveguide modes.
G. Govindarajan, E. Bahar
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Spurious modes in two‐dimensional isoparametric elements
International Journal for Numerical Methods in Engineering, 1979AbstractThe reasons for the presence of spurious modes in plane isoparametric elements are examined. Eigenvalue and eigenvector analyses of stiffness matrices for single elements and unconstrained and constrained meshes reveal the types of mechanisms and near‐mechanisms that can be expected when reduced or selective integration techniques are used with
Bicanic, N., Hinton, E.
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