Results 81 to 90 of about 14,944 (303)
Wavelength flattened directional couplers for mirrorsymmetric interferometers
, 2005 In the context of guided optics, we derive, analytically and geometrically, a rigorous general criterion to design wavelength insensitive interferometers with mirror symmetry, which are needed for wavelength multiplexing/demultiplexing.
Cherchi, Matteo, Tormen, Maurizio
core +1 more source
Microwave Measurements. Part II - Nonlinear Measurements [PDF]
, 2007 This paper addresses the problems in microwave non-linear measurements. It discusses techniques to synthesize loads, the most used non-linear measurement techniques, and harmonic load-pulling.
Camarchia, Vittorio +3 more
core +1 more source
High-directivity microstrip directional couplers
Electronics Letters, 1974 The letter describes a simple method for improving the directivity of side-coupled microstrip couplers an unmetallised piece of the substrate material is cemented on top of the microstrip structure. The measured directivity ranges from 30 to 40 dB. The couplers are fully compatible with normal microstrip techniques.
G. Haupt, H. Delfs
openaire +1 more source
Advanced Functional Materials, EarlyView.Precursor‐ and solvent‐mediated synthesis yields four Cu3(HHTP)2 morphologies with distinct physicochemical, sorption, and sensing properties toward SO2. Uptake capacities correlate with BET surface area, while sensing performance scales with particle aspect ratio.
Patrick Damacet +5 more
wiley +1 more source
Review of Substrate Integrated Waveguide Circuits for Beam-Forming Networks Working in X-Band
Applied Sciences, 2019 A review of substrate integrated waveguide (SIW) components designed for the use in beam-forming networks working in X-Band is presented. The proposed devices are four-port and six-port couplers and magic tees for the network.
Giuseppe Venanzoni +4 more
doaj +1 more source
Frequency response and tunability of grating-assisted directional couplers [PDF]
, 1991 The spectral properties of grating-assisted directional couplers are studied using an improved coupled mode formulation. Key parameters for the design of these structures, such as the grating period, the coupling length, and other structural parameters ...
Griffel, Giora, Yariv, Amnon
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An All‐Optical Driven Bio‐Photovoltaic Interface for Active Control of Live Cells
Advanced Functional Materials, EarlyView.Bio‐photovoltaic Interface (BIO‐PV‐I) for live cell manipulation is presented. BIO‐PV‐I can be activated non‐invasively and remotely to control the spatial motility, adhesion, and morphology of cells adhering to it. BIO‐PV‐I uses a patterned light‐induced electric potential in iron‐doped lithium niobate crystals whose light‐driven and reversible nature,
Lisa Miccio +8 more
wiley +1 more source
Design of Compact and Wideband Groove Gap Waveguide-Based Directional Couplers
IEEE AccessThis paper proposes a compact cross-shaped groove gap waveguide structure for creating wideband and compact directional couplers with different coupling levels.
Mahdieh Rabbanifard +3 more
doaj +1 more source
Gallium Arsenide (GaAs) Quantum Photonic Waveguide Circuits
, 2014 Integrated quantum photonics is a promising approach for future practical and large-scale quantum information processing technologies, with the prospect of on-chip generation, manipulation and measurement of complex quantum states of light.
Beetz, Johannes +16 more
core +1 more source
Advanced Functional Materials, EarlyView.Here, we present a high‐density PEDOT eutectogel electrode array for enhanced body surface gastric mapping. Silver electrodes are blade‐coated onto flexible substrates, followed by electrogelation of PEDOT:PSS and the deposition of a PEDOT:LS eutectogel.
Christopher Slaughter +8 more
wiley +1 more source