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Showing 1 to 19 of 19 for “"SIW"”.
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Integración de elementos activos en estructuras SIW
… de integrar elementos activos en estructuras SIW, Substrate Integrated Waveguide. Para ello, en primer lugar, se ha estudiado en profundidad la tecnología SIW con el objetivo de conocer su funcionamiento interno y las limitaciones de su topología que imposibilitan la incorporación directa en …
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Substrate integrated waveguide antenna systems
… to the design of substrate integrated waveguide (SIW) components in the mm-wave and microwave range. SIW has many advantages in comparison to conventional waveguides and microstrip lines, such as compact and planar structure, ease of fabrication, low radiation loss, high power handling ability and …
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In Situ Vibrational Spectroscopic and Electrochemical Study of Electrodeposition Additives on Copper Surfaces
… behavior of silicotungstate, alpha-SiW 12O404-, on copper, silver, and gold electrode surfaces was investigated using SERS and PM-IRRAS. The results show that silicotungstate interacts with Cu surfaces. This interaction is shown to be potential-dependent; alpha-SiW12O404- associates …
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Integration of microwave and millimeter wave bandpass filters with antennas
… First, the Substrate Integrated Waveguide (SIW) filter integration with dielectric resonator antenna (DRA) in millimeter-wave frequency range is presented. SIW is used to design the bandpass filter and serves as the feeding structure for DRA. Design integration with improved radiation …
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Kinetics and mechanism of an adsorptive displacement on polyoxotungstate modified electrodes
… the adsorption strength of silicotungstic acid (SiW$\sb{12}$) is stronger than that of the oxidized form of 2,6-disulfonated anthraquinone (2,6-AQDS) but weaker than that of the reduced form of 2,6-AQDS. Thus, the identity of the molecules adsorbed on the electrode surface in contact with a …
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Planar groove gap waveguides
… is the Substrate Integrated Waveguide (SIW). However, due to a lack of DC isolated planes of the structure, bridging wires or concentric etched rings are often used to enable active device biasing. This research presents a novel planar structure referred to as the Planar Groove Gap …
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Design and optimization of dielectric resonator antenna arrays based on substrate integrated waveguide technology for millimeter-wave applications
… arrays based on substrate integrated waveguide (SIW) technology, which has been proven to be promising for MMW applications. The objectives include both the development of highly efficient computer aided design and optimization techniques, and the development of new designs based on the SIW-DRA …
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Tunable compact microwave multiplexers based on substrate integrated waveguide
… using substrate integrated waveguide (SIW). Compared to conventional rectangular waveguide HCFM, the new design achieves 60% reduction in size. The feasibility of electronic tuning of the HCFM is also investigated using full wave electromagnetic (EM) simulations. The compact SIW HCFM is …
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Design, fabrication and characterization of sub-THz components in glass interposer substrates
… for RF interconnects (microstrip lines, CPWs and SIWs) on glass interposers up to 170 GHz. This work also presents a new class of filters in SIW technology called Blind Via Filters which are significantly smaller in size compared to the traditional SIW cavity filters. For making ultra-low loss …
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Organic-inorganic hybrid materials: new functionalised polyoxotungstates
… or (NBu\(_4\))\(_3\)Na[SiW\(_9\)O\(_{34}\)(R\(^2\)PO)\(_3\)] (X = Si or P; R\(^1\) = Bu or Et; R\(^2\) = Et, H\(_2\)C=CH, H\(_2\)C=CHCH\(_2\), H\(_2\)C=CHC\(_6\)H\(_4\), HOOC(CH\(_2\))\(_m\) (m = 1 or 2) or H\(_3\)CCOC\(_6\)H\(_4\); R\(^3\) = H\(_2\)C=CH or …
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Substrate Integrated Waveguide Horn Slot Antenna Array
Substrate integrated waveguide (SIW) is a rectangular dielectric-filled waveguide, which is synthesized in a planar substrate with arrays of metallic vias to realize bilateral side walls and its transitions with planar structures. These vias act as walls of the waveguide supporting current flow, …
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Characterization of Silicotungstate Anion Modified Metal Surfaces
… the onset of the first redox couple of alpha-H 4SiW12O40. QCM measurements suggested that negative potentials attracted alpha-SiW12O404- near Ag surfaces. XPS data qualitatively indicated that more alpha-SiW 12O404- was on Ag surfaces after potential cycle treatment. The multilayer-like features …
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Design of Microwave Front-End Narrowband Filter and Limiter Components
… by reducing a substrate-integrated waveguide (SIW) loaded evanescent-mode bandpass filter to a half-mode SIW (HMSIW) structure. Demonstrated third-order SIW and HMSIW filters have 1.7 GHz center frequency and 0.2 GHz bandwidth. Simulation and measurements of the filters utilizing combline …
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Development and optimization of reconfigurable planar lenses and reflectors
… Asimismo, se presenta un desfasador en SIW basado en ranuras inclinadas cargadas que reemplaza a los RTPS en SIW que se encuentran en la literatura, logrando rendimiento equivalente en una fracción de su tamaño (con una potencial reducción del 90% en longitud y del 50% en anchura). El …
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Einfluss des Insulin-ähnlichen Wachstumsfaktors I auf die Androgenrezeptor-Signaltransduktion in Prostatakrebszellen
Die im Rahmen dieser Arbeit durchgeführten Untersuchungen zum Einfluss der Wachstumsfaktoren IGF-I, EGF und dem Zytokin IL-6 auf den Androgenrezeptor-Signalweg zeigten in verschiedenen Prostatakarzinom-zelllinien schon nach zwei Stunden eine deutliche Degradation des Androgenrezeptor-Proteins. Die …
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Design of broad-band dual-polarized microstrip patch antennas with high port isolation for millimeter-wave 5G applications
… thesis, based on substrate integrated waveguide (SIW) cavity-backed microstrip antennas. Different structures and materials, and antenna types are explored. Wide impedance bandwidths of around 34% to 47% are achieved. In addition to very wide impedance bandwidth, the designs have a profile that is …
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Microvascular materials for adaptive electronic structures
… a cavity-backed substrate integrated waveguide (SIW) slot which is able to switch polarization states. Displacement of EGaIn surrounded by a non-conductive fluid in a serpentine channel results in a portion of the slot being shorted out, creating a signal polarization. Further displacement of the …
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Dielektrická rezonátorová anténa integrovaná do substrátu
Bakalářská práce se zabývá návrhem dielektrické rezonátorové antény v mikrovlnném pásmu X, kde je rezonátor tvořen pomocí perforací mikrovlnného substrátu. Celá anténa je tvořena dvěma vrstvami. Anténa je napájená vlnovodem integrovaným do substrátu. Je popsán návrh rozměrů pro dosažení požadované …