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1. Full Text Reflectionless Adaptive RF Filters: Bandpass, Bandstop, and Cascade Designs
by Psychogiou, Dimitra and Gomez-Garcia, Roberto
IEEE Transactions on Microwave Theory and Techniques, ISSN 0018-9480, 11/2017, Volume 65, Issue 11, pp. 4593 - 4605
A class of frequency-reconfigurable input-reflectionless/absorptive RF/microwave filters is presented. They consist of tunable complementary-duplexer... 
planar filter | bandpass filter | duplexer | Transfer functions | reconfigurable front end | Microstrip | Absorptive filter | Radio frequency | tunable filter | reflectionless filter | adaptive filter | filter cascade | Resonant frequency | reconfigurable filter | multiband filter | Microwave circuits | microstrip filter | lumped-element filter | Impedance | bandstop filter | ENGINEERING, ELECTRICAL & ELECTRONIC | Usage | Research | Impedance (Electricity) | Bandstop filters | Duplexers | Adaptive filters | Notches | Absorptivity | Bandpass filters | Selectivity | Microwave filters
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2. Full Text Helicenes—A New Class of Organic Spin Filter
by Kiran, Vankayala and Mathew, Shinto P and Cohen, Sidney R and Hernández Delgado, Irene and Lacour, Jérôme and Naaman, Ron
Advanced Materials, ISSN 0935-9648, 03/2016, Volume 28, Issue 10, pp. 1957 - 1962
Chiral helicene , a fully conjugated system without stereogenic carbon, can filter spins effectively at room temperature, a consequence of the chiral‐induced... 
magnetoresistance | CISS | chirality | spin filters | cationic helicene | PHYSICS, CONDENSED MATTER | PHYSICS, APPLIED | DYES | MATERIALS SCIENCE, MULTIDISCIPLINARY | OPTICAL-PROPERTIES | CHEMISTRY, PHYSICAL | NANOSCIENCE & NANOTECHNOLOGY | DOUBLE-STRANDED DNA | CHEMISTRY, MULTIDISCIPLINARY | ELECTRON TRANSMISSION | CHEMISTRY | CHIRALITY | SELECTIVITY | Magnetoresistance | Devices | Carbon | Magnetoresistivity | Chirality
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3. Full Text Protein interactions central to stabilizing the K⁺ channel selectivity filter in a four-sited configuration for selective K⁺ permeation
by David B. Sauer and Weizhong Zeng and Srinivasan Raghunathan and Youxing Jiang and Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Proceedings of the National Academy of Sciences of the United States of America, ISSN 0027-8424, 10/2011, Volume 108, Issue 40, pp. 16634 - 16639
The structural and functional conversion of the nonselective NaK channel to a K⁺ selective channel (NaK2K) allows us to identify two key residues. Tyr and Asp... 
Electric potential | Salts | Hydrogen bonds | Molecular structure | Lead | Ions | Potassium channels | Signatures | Potassium | Binding sites | INACTIVATION | ION SELECTIVITY | MECHANISM | KCSA | DETERMINANTS | MULTIDISCIPLINARY SCIENCES | PERSPECTIVES | COORDINATION | NA+ | CONDUCTION | POTASSIUM-CHANNEL | Sodium-Potassium-Exchanging ATPase - metabolism | Sodium-Potassium-Exchanging ATPase - genetics | Electrophysiology | Models, Molecular | Protein Conformation | Crystallography | Amino Acid Motifs | Potassium - chemistry | Proteins | Eukaryotes | Membrane filters | Index Medicus | Biological Sciences
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4. Full Text Direct power control of shunt active filter using high selectivity filter (HSF) under distorted or unbalanced conditions
by Mesbahi, Nadhir and Ouari, Ahmed and Ould Abdeslam, Djaffar and Djamah, Tounsia and Omeiri, Amar
Electric Power Systems Research, ISSN 0378-7796, 03/2014, Volume 108, pp. 113 - 123
This paper describes the design of a new configuration of direct power control (DPC) based on high selectivity filters (HSF) to achieve near-sinusoidal source... 
Direct power control (DPC) | Shunt active power filter (SAPF) | Switching table | High selectivity filter | Instantaneous powers | Distorted or unbalanced conditions | SYSTEM | CONTROL STRATEGIES | DESIGN | PWM RECTIFIERS | QUALITY IMPROVEMENT | HARMONIC COMPENSATION | DRIVES | ENGINEERING, ELECTRICAL & ELECTRONIC | 3-PHASE | SOURCE VOLTAGE | SYNCHRONOUS REFERENCE FRAME | Electrical engineering | Heat shock proteins | Control equipment industry | Analysis | Engineering Sciences | Computer Science | Signal and Image processing
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5. Full Text Balanced dual-mode SIW filter
by Chu, Peng and Wu, Ke
Electronics Letters, ISSN 0013-5194, 2/2019, Volume 55, Issue 4, pp. 208 - 210
This Letter proposes a balanced dual-mode substrate integrated waveguide (SIW) filter for the first time. Based on dual-mode square SIW cavities, perturbation... 
Microwave technology | BALUN BANDPASS FILTER | DESIGN | HIGH SELECTIVITY | ENGINEERING, ELECTRICAL & ELECTRONIC
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6. Full Text The Occupancy of Ions in the K + Selectivity Filter: Charge Balance and Coupling of Ion Binding to a Protein Conformational Change Underlie High Conduction Rates
by Zhou, Yufeng and MacKinnon, Roderick and Brookhaven National Laboratory, National Synchrotron Light Source (US)
Journal of Molecular Biology, ISSN 0022-2836, 2003, Volume 333, Issue 5, pp. 965 - 975
Potassium ions diffuse across the cell membrane in a single file through the narrow selectivity filter of potassium channels. The crystal structure of the KcsA... 
selectivity filter | potassium channel | ion occupancy | KcsA | permeation | Ion occupancy | Selectivity filter | Potassium channel | Permeation | CELLS | BIOCHEMISTRY & MOLECULAR BIOLOGY | CALCIUM CHANNELS | MUSCLE | ELECTRON-DENSITY MAPS | MOLSCRIPT | PORE | DIFFRACTION | SKELETAL | Potassium - metabolism | Potassium Channels - metabolism | Animals | Humans | Protein Binding | Protein Conformation | Rubidium - metabolism | Cesium - metabolism | Index Medicus | BNL | NATIONAL SYNCHROTRON LIGHT SOURCE | PROTEINS | BASIC BIOLOGICAL SCIENCES | CONFORMATIONAL CHANGES | MOLECULAR BIOLOGY
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7. Full Text Toward Routine Assessments of Auditory Filter Shape
by Shen, Y and Kern, AB and Richards, VM
JOURNAL OF SPEECH LANGUAGE AND HEARING RESEARCH, ISSN 1092-4388, 02/2019, Volume 62, Issue 2, pp. 442 - 455
Purpose: A Bayesian adaptive procedure, that is, the quick auditory filter (qAF) procedure, has been shown to improve the efficiency for estimating auditory... 
FEASIBILITY | NONLINEARITY | AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY | FREQUENCY-SELECTIVITY | SENSITIVITY | NOISE | LINGUISTICS | PSYCHOPHYSICAL TUNING CURVES | CONSONANT RECOGNITION | NORMAL-HEARING | BAYESIAN ADAPTIVE ESTIMATION | REHABILITATION | SPEECH RECOGNITION | Listening Skills | Accuracy | Hearing Impairments | Test Reliability | Age Differences | Bayesian Statistics | Auditory Discrimination | Hearing (Physiology) | Psychoacoustics | Psychological aspects | Physiological aspects | Analysis | Hearing disorders | Auditory perception | Test validity and reliability | Hearing | Tone | Noise | Efficiency | Listening | Data collection | Auditory thresholds | Frequency (Acoustics) | Hearing impairment
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8. Full Text Instantaneous ion configurations in the K+ion channel selectivity filter revealed by 2D IR spectroscopy
by Kratochvil, Huong T and Carr, Joshua K and Matulef, Kimberly and Annen, Alvin W and Li, Hui and Maj, Michał and Ostmeyer, Jared and Serrano, Arnaldo L and Raghuraman, H and Moran, Sean D and Skinner, J.L and Perozo, Eduardo and Roux, Benoît and Valiyaveetil, Francis I and Zanni, Martin T
Science, ISSN 0036-8075, 09/2016, Volume 353, Issue 6303, pp. 1040 - 1044
Potassium channels are responsible for the selective permeation of K+ ions across cell membranes. K+ ions permeate in single file through the selectivity... 
MECHANISM | KCSA | MULTIDISCIPLINARY SCIENCES | ENERGETICS | CONDUCTION | PROTEINS | POTASSIUM-CHANNEL | BINDING | PERMEATION | Potassium Channels - chemical synthesis | Models, Chemical | Sodium - chemistry | Bacterial Proteins - chemical synthesis | Bacterial Proteins - chemistry | Crystallography, X-Ray | Molecular Dynamics Simulation | Oxygen Isotopes - chemistry | Spectrophotometry, Infrared | Water - chemistry | Isotope Labeling | Potassium Channels - chemistry | Protein Conformation | Binding Sites | Carbon Isotopes - chemistry | Ions | Membranes | Molecular biology | Spectrum analysis | Index Medicus | Backbone | Infrared spectroscopy | Reproduction | Spectra | Selectivity | Two dimensional | Channels | Binding sites
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9. Full Text A flexible filter maintains a tight grip
by Gross, Adrian
Nature Chemical Biology, ISSN 1552-4450, 04/2019, Volume 15, Issue 4, pp. 319 - 320
Potassium channels allow the passage of potassium ions across membranes at rates approaching the diffusion limit while maintaining exquisite selectivity... 
COMPLEX | CHANNELS | SELECTIVITY | BIOCHEMISTRY & MOLECULAR BIOLOGY | ION-BINDING | Proteins | Diffusion rate | Membranes | Selectivity | Potassium channels | Potassium
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10. Full Text Synthesis Design of Box-Section Bandpass Filter With Hybrid \lambda/4 and Dual-Mode Resonators
by Chuan Ge and Xiao-Wei Zhu and Wen-Cui Zhu and Xin Jiang
IEEE Microwave and Wireless Components Letters, ISSN 1531-1309, 12/2014, Volume 24, Issue 12, pp. 836 - 838
In this letter, a box-section bandpass filter consisting of hybrid λ/4 and dual-mode resonators at X-band is presented. Compared with the conventional even-odd... 
Band-pass filters | Bandpass filter (BPF) | Microstrip resonators | hybrid resonators | Resonant frequency | high selectivity | Circuit synthesis | Passband | Admittance | Microwave filters | box section | synthesis design | ENGINEERING, ELECTRICAL & ELECTRONIC | Noise levels | Synthesis | Equivalence | Skirts | X-band | Bandpass filters | Resonators | Microwaves
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11. Full Text A pharmacological master key mechanism that unlocks the selectivity filter gate in K+ channels
by Schewe, M and Sun, H and Mert, U and Mackenzie, A and Pike, ACW and Schulz, F and Constantin, C and Vowinkel, KS and Conrad, LJ and Kiper, AK and Gonzalez, W and Musinszki, M and Tegtmeier, M and Pryde, DC and Belabed, H and Nazare, M and de Groot, BL and Decher, N and Fakler, B and Carpenter, EP and Tucker, SJ and Baukrowitz, T
SCIENCE, ISSN 0036-8075, 02/2019, Volume 363, Issue 6429, pp. 875 - 875
Potassium (K+) channels have been evolutionarily tuned for activation by diverse biological stimuli, and pharmacological activation is thought to target these... 
CONDUCTANCE | K-2P | HERG | POTASSIUM CHANNELS | STRUCTURAL BASIS | HIGH-THROUGHPUT | BK CHANNELS | MULTIDISCIPLINARY SCIENCES | CONSTANT-PRESSURE | PARTICLE MESH EWALD | MOLECULAR-DYNAMICS SIMULATIONS | Molecular dynamics | Analysis | Pharmaceutical research | Potassium channels | Research | Pharmacokinetics | Calcium | Epilepsy | Activation | Potassium conductance | Selectivity | Drug development | Crystallography | Channels | X-ray crystallography | Pain | Occupancy | Potassium channels (voltage-gated) | Gating | Calcium channels | Channel gating | Calcium channels (voltage-gated) | Pharmacology | Functional analysis | Resistance | Dynamic tests | Calcium conductance | Conductance | Potassium | Calcium ions
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12. Full Text Ultracompact Multilayer Fabry-Perot Filter Deposited in a Micropit
by Wei Wang and Xin Li and Jun Luo and Wei Cai and Xumin Gao and Gangyi Zhu and Yongjin Wang
Journal of Lightwave Technology, ISSN 0733-8724, 11/2017, Volume 35, Issue 22, pp. 4973 - 4979
We fabricate a multilayer Fabry-Perot filter (FPF) on a GaN-on-silicon platform. Being significantly different from conventional thin film FPFs formed on... 
Reflectivity | optical filters | Sea measurements | dielectric films | Cavity resonator filters | Reflection | Silicon | sputtering | Gallium nitride | Surface treatment | Optical surface waves | THIN-FILMS | WAVELENGTH | CAVITY | OPTICS | TELECOMMUNICATIONS | GAAS | ENGINEERING, ELECTRICAL & ELECTRONIC | Thin films | Blue shift | Spectra | Selectivity | Flat surfaces | Composing | Curve fitting
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13. Full Text Structural properties determining low K affinity of the selectivity filter in the TWIK1 K channel
by Tsukamoto, Hisao and Higashi, Masahiro and Motoki, Hideyoshi and Watanabe, Hiroki and Ganser, Christian and Nakajo, Koichi and Kubo, Yoshihiro and Uchihashi, Takayuki and Furutani, Yuji
Journal of Biological Chemistry, ISSN 0021-9258, 2018, Volume 293, Issue 18, pp. 6969 - 6984
Canonical K+ channels are tetrameric and highly K+-selective, whereas two-pore-domain K+ (K2P) channels form dimers, but with a similar pore architecture. A... 
MECHANISM | infrared spectroscopy (IR spectroscopy) | CRYSTAL-STRUCTURE | BIOCHEMISTRY & MOLECULAR BIOLOGY | RESOLUTION | quantum chemistry | molecular dynamics | metal ion-protein interaction | DOMAIN POTASSIUM CHANNELS | INACTIVATION | ION SELECTIVITY | ATOMIC-FORCE MICROSCOPY | CONFORMATIONAL-CHANGE | SPECTROSCOPY | ion channel | fluorescence | Fourier transform IR (FTIR) | potassium channel | biophysics | BINDING | Potassium - metabolism | Potassium Channels, Tandem Pore Domain - metabolism | Biophysical Phenomena | Sodium - metabolism | Spectroscopy, Fourier Transform Infrared | Molecular Dynamics Simulation | Quantum Theory | Animals | Spectrophotometry, Infrared | Hydrogen Bonding | Microscopy, Atomic Force | Potassium Channels, Tandem Pore Domain - chemistry | Protein Conformation | Cations | Mice | Liposomes | Index Medicus | Molecular Biophysics
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14. Full Text Shifts in the selectivity filter dynamics cause modal gating in K + channels
by Jekhmane, Shehrazade and Medeiros-Silva, João and Li, Jing and Kümmerer, Felix and Müller-Hermes, Christoph and Baldus, Marc and Roux, Benoît and Weingarth, Markus
Nature Communications, ISSN 2041-1723, 12/2019, Volume 10, Issue 1, pp. 123 - 123
Spontaneous activity shifts at constant experimental conditions represent a widespread regulatory mechanism in ion channels. The molecular origins of these... 
INACTIVATION | MOLECULAR-DYNAMICS | ACTIVATION | SOLID-STATE NMR | MECHANISM | STRUCTURAL BASIS | KCSA | MULTIDISCIPLINARY SCIENCES | RECEPTOR | CONFORMATIONAL DYNAMICS | POTASSIUM-CHANNEL | Nuclear magnetic resonance--NMR | Channel gating | Molecular dynamics | Ions | Selectivity | Potassium channels | Hydrogen bonding | Mutants | Regulatory mechanisms (biology) | Potassium channels (voltage-gated) | Ion channels | Mutation | Gating | Potassium | Bonding | Conformation | Index Medicus
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15. Full Text Lossless and high-resolution RF photonic notch filter
by Liu, Yang and Marpaung, David and Choudhary, Amol and Eggleton, Benjamin J
Optics Letters, ISSN 0146-9592, 11/2016, Volume 41, Issue 22, pp. 5306 - 5309
A novel technique to create a lossless and tunable RF photonic bandstop filter with an ultra-high suppression is demonstrated using the combination of an... 
CIRCUITS | STIMULATED BRILLOUIN-SCATTERING | COMPLEX-COEFFICIENT | OPTICS | SELECTIVITY | Optical resonance | Broadband | Scattering | Insertion loss | Bandwidth | Resonators | Lossless | Photonics
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16. Full Text Microwave photonic multiband filter with independently tunable passband spectral properties
by Liu, Qidi and Ge, Jia and Fok, Mable P
Optics Letters, ISSN 0146-9592, 11/2018, Volume 43, Issue 22, pp. 5685 - 5688
Multiband RF filters with independently controllable passbands are an essential component in dynamic multiband RF communications. Unfortunately, even a fixed... 
PHASE | CHIP | PROCESSOR | STIMULATED BRILLOUIN-SCATTERING | OPTICS | BANDPASS FILTER | SELECTIVITY | Radio frequency | Fourier transformation | Properties (attributes) | Fourier transforms | Stability | Filter design (mathematics) | Product design | Trigonometric functions | Microwave photonics | Group delay
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17. Full Text Novel UWB Bandpass Filter Using Stub-Loaded Multiple-Mode Resonator
by Qing-Xin Chu and Xiao-Hu Wu and Xu-Kun Tian
IEEE Microwave and Wireless Components Letters, ISSN 1531-1309, 08/2011, Volume 21, Issue 8, pp. 403 - 405
Novel compact ultra-wideband (UWB) bandpass filter (BPF) using stub-loaded multiple-mode resonator (MMR) is presented in this letter. The MMR is constructed by... 
Wireless communication | Bandpass filter (BPF) | compact | Cutoff frequency | Band pass filters | Filtering theory | Loss measurement | multiple-mode resonator (MMR) | Passband | ultra-wideband (UWB) | Ultra wideband technology | ENGINEERING, ELECTRICAL & ELECTRONIC | Filtering | Filtration | Simulation | Resonant frequencies | Bandpass filters | Selectivity | Resonators | Microwaves
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18. Full Text Design and Analysis of EMIT Filter and Diplexer
by Xian Qi Lin and Jun Ye Jin and Jia Wei Yu and Yuan Jiang and Yong Fan and Quan Xue
IEEE Transactions on Industrial Electronics, ISSN 0278-0046, 04/2017, Volume 64, Issue 4, pp. 3059 - 3066
In this paper, a novel design of an E-plane waveguide filter, called electromagnetically induced transparency (EMIT) filter, is proposed. This EMIT filter is... 
Band-pass filters | Optical filters | electromagnetically induced transparency (EMIT) | Magnetic separation | EMIT filter | Resonator filters | Compact diplexer | Electromagnetic waveguides | Filtering theory | electric and magnetic resonances | waveguide filter | Microwave filters | ELECTROMAGNETICALLY INDUCED TRANSPARENCY | ENGINEERING, ELECTRICAL & ELECTRONIC | INSTRUMENTS & INSTRUMENTATION | WAVE-GUIDE FILTERS | WIDE-BAND | E-PLANE FILTERS | BANDPASS FILTER | AUTOMATION & CONTROL SYSTEMS | Waveguide filters | Couplings | Insertion loss | Diplexers | Selectivity | Substrates | Group delay | Equivalent circuits
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