Results 261 to 270 of about 300,543 (295)
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Tunable microwave filters using ferroelectric materials
IEEE Transactions on Appiled Superconductivity, 2003A new design approach for a microstrip tunable filter on a two-layered substrate with BSTO thin films is suggested. The coupling factor of a ferroelectric capacitor connected to the microstrip resonators of the filter is considered to make possible the design of the filter with constant pass band width while tuning. Results of the filter characteristic
I. Vendik +3 more
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Porous materials with tunable mechanical properties
Journal of Porous Materials, 2014We present a study of the mechanical properties of porous polymer materials elaborated from the controlled formulation of emulsions and using a polyHIPE templating approach. This consists in the polymerization of high internal phase water-in-oil emulsions of controlled average size and dispersed phase volume fraction.
Ceglia, G. +4 more
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Tunable photonic crystals using ferroelectric materials
2006 13th IEEE International Conference on Electronics, Circuits and Systems, 2006For microwave applications, there is a great demand for frequency tunable devices. Most of the time, these devices are obtained by including discrete components in the structures. We propose here to use a ferroelectric material with weak losses. It will be associated with frequency selective surfaces and photonic crystals.
L. Oyhenart, V. Vigneras
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Electrically tunable materials for microwave applications
Applied Physics Reviews, 2015Microwave devices based on tunable materials are of vigorous current interest. Typical applications include phase shifters, antenna beam steering, filters, voltage controlled oscillators, matching networks, and tunable power splitters. The objective of this review is to assist in the material selection process for various applications in the microwave ...
Aftab Ahmed +2 more
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Crystallization of “tunable” substrate optoelectronic materials
Materials Science and Engineering: A, 1993Abstract This work can partially contribute to the direct growth of bulk substrate crystals of TSS (Ternary Solid Solutions) -- (Ga.In)Sb -- with a lattice parameter “a” constant throughout the significant part of the ingot length. The combination of our original methods CAM-S (A Crystallization Method Providing Composition Autocontrol in Situ) and ...
J.J. Venkrbec +8 more
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Light propagation in tunable photonic materials
Photonic Metamaterials: From Random to Periodic, 2006We will discuss light transport in complex photonic structures like random lasers and photonic crystals. In particular we will focus on tuning and switching via liquid crystal infiltration and discuss various models of random lasing.
Diederik S. Wiersma +7 more
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Tunable Optical Nonlinearities in Layered Materials
ACS PhotonicsNonlinear optical processes lie at the heart of frequency tunable coherent light sources, including entangled photon sources and squeezed states of light, and they have become ubiquitous in fields ranging from ultrafast spectroscopy to quantum information processing.
Chiara Trovatello +5 more
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Tunable dielectric materials and devices
IEEE MTT-S International Microwave Symposium Digest, 2005., 2005B. York, S. Gevorgian
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Electrostatic gating and intercalation in 2D materials
Nature Reviews Materials, 2022Yecun Wu, Danfeng Li, Yi Cui
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