Results 31 to 40 of about 14,944 (303)
IEEE Photonics Journal, 2020 This work presents a design approach of multi-segment directional couplers with ultra-broadband flat spectra and benign fabrication tolerance on the silicon nitride platform.
Lemeng Leng +5 more
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Silica Waveguide Four-Mode Multiplexer Based on Cascaded Directional Couplers
Photonics, 2023 Mode multiplexers/demultiplexers (MUX/deMUX) are key components in mode division multiplexing. A silica waveguide mode MUX consisting of four cascaded directional couplers is experimentally demonstrated.
Manzhuo Wang +7 more
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Integrated-optical directional coupler biosensor
Optics Letters, 1996 We present measurements of biomolecular binding reactions, using a new type of integrated-optical biosensor based on a planar directional coupler structure. The device is fabricated by Ag(+) - Na(+) ion exchange in glass, and definition of the sensing region is achieved by use of transparent fluoropolymer isolation layers formed by thermal evaporation.
Luff, B.J. +4 more
openaire +4 more sources
Directional microwave coupled-line couplers with high lateral coupling level
Доклады Белорусского государственного университета информатики и радиоэлектроники, 2021 Classic сoupled-line couplers with a high lateral coupling level by type of directivity are counterdirectional. Restrictions on their synthesis are imposed by the gap between transmission lines, which must be extremely small (tens of microns), the ...
I. A. Fanyaev
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IEEE Access, 2019 A class of wideband directional couplers suitable for achieving different coupling levels are proposed in this paper. The proposed couplers have been implemented using the double-layer groove gap waveguide at the millimeter-wave frequency range. They are
Davoud Zarifi +2 more
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Ion beam micromachining of integrated optics components [PDF]
, 1973 Thin film integrated optics components such as light guides, modulators, directional couplers, and polarizers demand high quality edge smoothness and high resolution pattern formation in dimensions down to submicrometer size.
Garmire, E. +4 more
core +1 more source
IEEE AccessHigh-directivity and low-loss directional couplers based on Empty Substrate Integrated Coaxial Line (ESICL) technology are presented in this article. The proposed coupled line directional couplers are based on the combination of a high-isolation section,
David Herraiz +6 more
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Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment
Molecular Oncology, EarlyView.This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley +1 more source
A Practical Method for Measuring Incident Microwave Power in RF Systems of Particle Accelerators
International Journal of Antennas and PropagationIn high reflection microwave power measurements with load impedance mismatch, the limited directional performance of directional couplers introduces interference from reverse signals, which affects the accuracy of incident microwave power measurements ...
Zeng Fanjian +4 more
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30 dB microstrip coupler with high directivity
Sustainable Engineering and Innovation, 2020 Due to inhomogeneous structure of a microstrip directional couplers, i.e. partly dielectric substrate, partly air, they mostly present property of poor directivity and low coupling level.
Azra Yildiz, Şehabeddin Taha İmeci
doaj +1 more source