Results 21 to 30 of about 2,389 (259)
All-optical switching using a new photonic crystal directional coupler
Advanced Electromagnetics, 2015 In this paper all-optical switching in a new photonic crystal directional coupler is performed. The structure of the switch consists of a directional coupler and a separate path for a control signal called “control waveguide”.
B. Vakili +2 more
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Investigation on Strong Coupling Behaviors of THz Subwavelength Directional Couplers
IEEE Photonics Journal, 2012 To achieve strong coupling, conventional fiber-based directional couplers often require complicated fabrication. Here, by placing two identical THz subwavelength fibers parallel to each other and by simply tuning the separation in between, we investigate
Tzu-Fang Tseng +5 more
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A design of terahertz waveguide directional coupler with double "tian-shape"
Dianzi Jishu Yingyong, 2018 The terahertz waveguide directional coupler with double "tian-shape" is designed basing on the directional coupling principle of branch line. A transverse line is added across the three branch lines to form a "tian-shape " structure.
Wang Ying +3 more
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Designing a Downsized Quadrature Directional Coupler
Telfor Journal, 2021 To miniaturize directional couplers, the replacement of their quarter-wave sections with electrodynamic structures with equivalent characteristics at smaller physical dimensions is used.
D. A. Letavin
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PhC-based Majority Gate using a nonlinear directional coupler [PDF]
Journal of Optoelectronical Nanostructures, 2021 Wide bandwidth and high data transfer rates are essentialadvantages of optical telecommunication networks. Fullexploitation of the benefits of optical communicationsrequires a fully optical network. All-optical circuits areone of the main alternatives to
Reyhaneh Rigi +2 more
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A Transistorized Directional Coupler
IEEE Transactions on Circuit Theory, 1968 In previous papers an active directional coupler using a triode, [1],[2] and its use in a bidirectional broad-band amplifier, [3] has been described. It is obvious that it is important to investigate how such a device can be realized using semiconductor techniques.
Denoth F., Pellegrini B.
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Modal Analysis of Directional Coupler and Its Equivalent Circuit
Advanced Electromagnetics, 2019 A modal analysis for the directional coupler is presented in this paper. The analysis is based on the mode-matching technique. The theory is verified by Ansoft HFSS software at a directional coupler with standard X-band (WR 90) rectangular waveguide ...
M. Mohammadi
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Calibration of a Polarimetric Microwave Radiometer Using a Double Directional Coupler
Remote Sensing, 2021 This paper presents a built-in calibration procedure of a 10-to-20 GHz polarimeter aimed at measuring the I, Q, U Stokes parameters of cosmic microwave background (CMB) radiation.
Luisa de la Fuente +3 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
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Novel broadband design of SIW directional coupler
The Journal of Engineering, 2019 To enable broadband characteristic, a novel type of directional coupler based on slot coupling theories is proposed. Besides, this directional coupler is designed on the basis of substrate integrated waveguide.
Jia Wang, Tianqing Ling
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