Results 241 to 250 of about 32,779 (303)
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Combline Filters using Conical Resonators
33rd European Microwave Conference, 2003, 2003This paper describes a novel configuration for combline filters employing conical rods as central conductors in the resonators. With respect to resonators with uniform rods, this shape allows a reduction of the capacitive loading for a given length of the resonator; as a consequence, a larger gap at the rods end can be employed (it is particularly ...
M. Fumagalli +3 more
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Off-resonance frequency filtered magnetic resonance imaging
Magnetic Resonance Imaging, 2010One of the main problems with rapid magnetic resonance imaging (MRI) techniques is the artifacts that result from off-resonance effects. The proposed off-resonance frequency filtered MRI (OFF-MRI) method focuses on the elimination of off-resonance components from the image of the observed object.
Jure, Medic, Saso, Tomazic
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Information filtering in resonant neurons
Journal of Computational Neuroscience, 2015Neuronal information transmission is frequency specific. In single cells, a band-pass like frequency preference can arise from the subthreshold dynamics of the membrane potential, shaped by properties of the cell's membrane and its ionic channels. In these cases, a cell is termed resonant and its membrane impedance spectrum exhibits a peak at non ...
Blankenburg, Sven +3 more
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Guided-mode resonance Brewster filter
Optics Letters, 1998A new type of optical filter is predicted theoretically and verified experimentally. The filter operates under guided-mode resonance conditions in a thin-film waveguide grating. A high-efficiency reflection filter response is produced at the Brewster angle at which TM reflection is classically prohibited. Low-reflectance sidebands are obtained that are
R, Magnusson, D, Shin, Z S, Liu
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Nonpolarizing guided-mode resonance filter
Optics Letters, 2009A normal-incidence nonpolarizing guided-mode resonance filter is designed. There are two waveguide layers and one grating layer in the filter. By adjusting the distance between the two waveguide layers, the same resonance wavelength for both TE and TM polarization can be achieved.
Xiaoyong, Fu +3 more
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IEEE Journal of Quantum Electronics, 1988
The atomic resonance filter (ARF) is an ultranarrowband (Q approximately 10/sup 5/-10/sup 6/), large-acceptance-angle, isotropic optical filter. These features make the device ideally suited for applications in which weak laser signals are detected against a continuum background.
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The atomic resonance filter (ARF) is an ultranarrowband (Q approximately 10/sup 5/-10/sup 6/), large-acceptance-angle, isotropic optical filter. These features make the device ideally suited for applications in which weak laser signals are detected against a continuum background.
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Divergence-tolerant resonant bandpass filters
Optics Letters, 2016Bandpass filters based on subwavelength dielectric gratings are grounded in physical principles that are totally distinct from their thin-film counterparts. Ease in fabrication, design scalability, material sparsity, and on-chip integration compatibility makes them a promising alternative especially for long-wavelength applications. Here we demonstrate
Yeong Hwan, Ko +2 more
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Ultracompact photonic crystal resonant filters
Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, 2003Summary form only given. Efficient waveguiding by 2D photonic crystal (PC) waveguide filters has been demonstrated both theoretically and experimentally for straight waveguides, bends and single microcavities. We demonstrate that resonant cavities can be obtained by inserting proper defects along a one missing-row PC waveguide.
R. Costa +2 more
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2002 IEEE Ultrasonics Symposium, 2002. Proceedings., 2003
Coupled Resonator Filters (CRF) are a new form of bulk acoustic wave device that involves the vertical stacking of resonators. In that regard, the CRF can be thought of as a variation on the better known Stacked Crystal Filter (SCF). This paper will review the SCF and expand on the basic concepts of the CRF.
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Coupled Resonator Filters (CRF) are a new form of bulk acoustic wave device that involves the vertical stacking of resonators. In that regard, the CRF can be thought of as a variation on the better known Stacked Crystal Filter (SCF). This paper will review the SCF and expand on the basic concepts of the CRF.
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Multiple resonance FTR filters for nonpolarizing bandpass filters
Applied Optics, 1984A design procedure is given for multiple resonance FTR filters which are required to be nonpolarizing for a specific wavelength and angle of incidence. The optimum thickness of the buffer layer is derived to make the phase velocities of TE and TM modes coincide in a twin-waveguide system.
H, Kitajima, K, Fujita, H, Cizmic
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