Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Substrate Integrated Waveguide"”.
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Substrate integrated waveguide antenna systems
… of research has been done 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, …
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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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Tunable compact microwave multiplexers based on substrate integrated waveguide
… filter module (HCFM) implemented 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) …
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Substrate integrated waveguide microwave antenna and filter design using H-fractal unit cell
… in a poor performance of the proposed devices. Substrate integrated waveguide with H-shaped fractal unit cell is proposed in this work to overcome these challenges. The proposed antenna operates at 4 GHz and 5.7 GHz frequencies bands which suite the lower 5G applications. The proposed antenna …
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Design and optimization of dielectric resonator antenna arrays based on substrate integrated waveguide technology for millimeter-wave applications
… resonator antenna (DRA) 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 …
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30 GHz Switchable Waveguide Antenna: Prototype Antenna Solution for 60 GHz Wi-Fi Protocol 802.11 ad
… In response to these requirements, a switchable waveguide structure was built by combining substrate integrated waveguide technology with controllable reflectors. Prototypes were designed and manufactured at 30 GHz to test this new technology. Prototypes included 1-way, 2-way and 4-way switchable …
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Integration of microwave and millimeter wave bandpass filters with antennas
… integrations are investigated. 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 …
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Development of waveguide filter structures for wireless and satellite communications
… and realization of compact conventional and substrate integrated waveguide structures with improved performance taking advantage of recent cross-coupled resonator filters theory achievements such as the modular filter design approach using non-resonating nodes and inline extracted pole …
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Integración de elementos activos en estructuras SIW
… 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 su …
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Design of broad-band dual-polarized microstrip patch antennas with high port isolation for millimeter-wave 5G applications
… topologies are proposed in this 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, …
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Analysis and Design of Low-Cost Waveguide Filters for Wireless Communications
… research of this thesis is built around advanced waveguide filter structures. Waveguide filters and the waveguide technology in general are renowned for high power capacity, low losses and excellent electromagnetic shielding. Waveguide filters are important components in fixed wireless …
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Planar groove gap waveguides
… planar medium to achieve this integration 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 …
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Design of Microwave Front-End Narrowband Filter and Limiter Components
… power levels. This is accomplished 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 …
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Design, simulation and manufacturing techniques for fully textile integrated microwave circuits and antennas
… the most employed techniques to develop textile integrated circuits and antennas, such as inkjet-printing over textile substrates, embroidery, appliqué processes or the use of non-woven materials or, simply, non-wovens. The beforementioned techniques present different problems, consequently, …
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Microvascular materials for adaptive electronic structures
… a fugitive ink. One antenna is 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 …
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Development and optimization of reconfigurable planar lenses and reflectors
… thesis proposes instead to link them through a substrate integrated waveguide (SIW), making it the first array lens based on that technology. A novel SIW phase shifter is also posited, based on loaded tilted slots that replaces the SIW reflection-type phase shifters found in the literature, …