Patch Filter
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Higher Order Mode Attenuation in Microstrip Patch Antenna with DGS H Filter Specification from 5 to 10 GHz Range
Abstract This work proposes the application of a slot in the ground plane, Defected Ground Structure (DGS), of a microstrip patch antenna. The application of this technique aims to attenuate higher-order excited modes without deteriorating the antenna parameters in the fundamental mode. The methodology for the design of the slot in H-format is presented, bas
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-06
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2. A Novel Fractal Multi-band Frequency Selective Surface
Abstract In this paper, a new multiband fractal frequency selective surface (MF-FSS) is proposed. The work presents a new fractal design methodology for FSSs with Swastika fractal patch elements. The proposed MF-FSS includes periodic arrays of metallic patches, printed on a single layer substrate. The structure parametric analysis is carried out in terms of
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 19/06/2019
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3. Compact Filtenna for WLAN Applications
Abstract This manuscript proposes a Filtenna operating in the frequency range of 5.15-5.35 GHz for possible application in wireless local area network (WLAN). Initially, a monopole antenna consisting of a square loop radiating patch is designed at 5.2 GHz and is integrated into a bandpass filter (BPF) with centre frequency of 5.2 GHz. Within the proposed fre
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2019-03
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4. Projeto de filtros de microondas passa-faixa planares utilizando ressoadores patch dual-mode. / Design of microwave planar bandpass filters using dual-mode patch resonators.
Esta dissertação de mestrado apresenta uma metodologia de projeto de filtros de microondas planares passa-faixa tipo patch dual-mode, que associam baixas perdas nos condutores, boa capacidade de potência, rejeição da banda de segunda harmônica e miniaturização. Utilizou-se a ferramenta computacional MATLAB para desenvolver programas de cálculo de di
Publicado em: 2007
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5. A psychophysical dissection of the brain sites involved in color-generating comparisons
We have used simple psychophysical methods to determine the sites of color-generating mechanisms in the brain. In our first experiment, subjects viewed an abstract multicolored “Mondrian” display through one eye and an isolated patch from the display through the other. With normal binocular/monocular viewing, the patch has a different color when viewed o
The National Academy of Sciences.
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6. Detection of jumps in single-channel data containing subconductance levels.
Detection algorithms are widely used for the analysis of single-channel data because they remove the background noise from the measured current signal and reconstruct the noise-free time series. Standard detection algorithms assume channels switching only between zero and full conductance. Many types of channels, however, show subconductance levels. A new de
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7. Topology of the P segments in the sodium channel pore revealed by cysteine mutagenesis.
The P segments of the voltage-dependent Na+ channel line the outer mouth and selectivity filter of the pore. The residues that form the cytoplasmic mouth of the pore of the channel have not been identified. To study the structure of the inner pore mouth, the presumed selectivity filter residues (D400, E755, K1237, and A1529), and three amino acids just amino
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8. A recurrent RNA-binding domain is appended to eukaryotic aminoacyl-tRNA synthetases
Aminoacyl-tRNA synthetases of higher eukaryotes possess polypeptide extensions in contrast to their prokaryotic counterparts. These extra domains of poorly understood function are believed to be involved in protein–protein or protein–RNA interactions. Here we showed by gel retardation and filter binding experiments that the repeated units that build the
Oxford University Press.
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9. Single-unit and 2-deoxyglucose studies of side inhibition in macaque striate cortex.
In the course of studies to map spatial frequency tuning of neurons in layers 2 and 3 of macaque striate cortex, we found that a high proportion (70%) of cells in the interblob regions responded poorly to full-field gratings, compared with responses to single bars, edges, or delimited gratings. This was most often due to side inhibition, in which increasing
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10. Estimation of kinetic rate constants from multi-channel recordings by a direct fit of the time series.
The maximum-likelihood technique for the direct estimation of rate constants from the measured patch clamp current is extended to the analysis of multi-channel recordings, including channels with subconductance levels. The algorithm utilizes a simplified approach for the calculation of the matrix exponentials of the probability matrix from the rate constants
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11. Heterogeneity of neuronal nicotinic acetylcholine receptors in thin slices of rat medial habenula.
1. Neuronal nicotinic acetylcholine receptors in slices of rat medial habenula were studied using patch clamp recording techniques. 2. Whole cell current responses to cytisine could be blocked by hexamethonium, as expected for nicotinic receptors. The whole cell current-voltage relations were linear at negative membrane potentials, but showed strong inward r
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12. Gating and conductance properties of a human delayed rectifier K+ channel expressed in frog oocytes.
1. The human delayed rectifier K+ channel h-DRK1, a homologue to the DRK1 channel in the rat, was expressed in Xenopus oocytes. Single-channel currents were measured in micropatches; macroscopic currents were measured either in macropatches, giant patches, or whole oocytes. 2. Macroscopic currents activated at -20 mV and more positive. The instantaneous curr