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 20 of 78 for “"FSS"”.
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Frequency selective surface (FSS) for cellular signals shelding
… thesis proposes a frequency selective surface (FSS) for interference control causes by the proliferation of mobile devices. FSS is a periodic structure etched on a dielectric substrate which acts as a spatial filter. The proposed FSS is designed as a band-stop filter to attenuate the cellular …
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Stealth technologies based on thin microwave FSS absorbers
… resistively loaded Frequency Selective Surfaces (FSS). <br/><br/>The deployment of ultra-thin (≤ λ/17) microwave FSS absorbers is proposed as a means to reduce the scattering of electromagnetic energy from the surface of satellite platforms which are covered with thermal blankets. This is achieved …
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An electronic beam-steering antenna using a tunable FSS
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Design of reflectarray antenna integrated with FSS textured configurations for wireless communication applications
… employing reflectarray antenna integrated with FSS textured configurations to combat the scan blindness problem. Performance investigation of different strategic resonant elements has been carried out in X-band frequency range by using commercially available computer models of CST MWS and Ansoft …
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Influence of composition and thermomechanical processing on microstructure evolution in AISI 430 ferritic stainless steel(FSS)
This thesis examines the influence of austenite potential and hot roll finish temperature on the evolution of microstructure in the ferritic stainless steel grade AISI 430. In particular, it focuses on the influence of these variables on the hot band annealing behaviour of this steel. The material …
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Design a high gain UWB mimo uniplanar monopole antenna with FSS array for metallic object microwave imaging
… uniplanar UWB frequency selective surface (FSS) unit cell size (0.095λx0.095λ) is miniaturized on the FR4 substrate. The simulations are compared with the equivalent circuit models of the proposed solutions, then validate with the measurement results. In the development phase, the hexagonal …
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Farm saved seed (FSS) and royalty generation for wheat in France, United Kingdom, and Australia - policy implications for Canada
… Farmers have the option to use farm saved seed (FSS) or certified seed on their farm. The additional economic benefit created from the innovation and its distribution is analyzed and interpreted for both, farmers (social benefit) and breeders (private benefit). The results of the analysis show …
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Frequency selective surface-based sensing: Theory and applications
"Frequency selective surfaces (FSS) are periodic arrays of resonant elements with a specific (resonant) reflection/transmission response when illuminated by electromagnetic energy. FSSs have been utilized for different applications such as spatial filters, reflectors, lenses, radomes, and more …
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Material Correspondence Method: a practice-based research on embodied experiences of Functional Somatic Syndrome (FSS) and Somatic Symptom Disorder (SSD) through painting.
… particularly Functional Somatic Syndrome (FSS) and Somatic Symptom Disorder (SSD) through investigations of the medium of painting. The purpose of the research primarily consists on exploring painting as an investigative tool able to address, understand and communicate embodied experiences. …
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An evaluation of the implementation of Education White Paper 6 in selected full-service schools in KwaZulu-Natal
… two of implementing 50 full-service schools (FSS) and further development is said to be based on results from immediate to short-term results (DoE, 2005a). Concerns over the new development relate to whether resources are sufficient and available to further expand the provision of FSS and, …
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A cell-based sensor of fluid shear stress for microfluidics
… Flows inevitably generate fluid shear stress (FSS) that may cause undesirable physiological cell stress. Simple assays of cell viability, morphology or growth are typically reported to indicate any gross disturbances to cell physiology. However, no straightforward metric exists to specifically …
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Going With The Flow: Selective phosphodiesterase 4D7 (PDE4D7) regulation of vascular endothelial cell responses to fluid shear stress
… by the flowing blood, fluid shear stress (FSS). The hemodynamics dictating this force determine, to a large extent, the likelihood that a given region of a blood vessel will develop atherosclerotic plaque. In linear arterial segments, VECs are exposed to high laminar unidirectional FSS …
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Evaluating the Effects of Fluid Shear Stress on Ovarian Cancer Progression and Metastatic Potential
… forces, particularly fluid shear stress (FSS). These biomechanical forces, only recently identified as a hallmark of cancer, induce rapid signaling events in attached and aggregated cells, a process termed mechanotransduction. The cellular responses to these forces and their impact on …
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An Investigation of Dual-Band Fabry-Pérot Resonant Cavity Antennas
… antenna that uses a frequency selective surface (FSS) patch layer over a ground plane to form a composite artificial ground plane that replaces the single metal ground plane of the conventional structure. The structure thus consists of an upper cavity region (between the FSS and the partially …
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New sharing method between the Fixed Satellite Service and the Aeronautical Mobile Satellite Service in the 14.0-14.5 GHz band
… a primary basis to the Radio-Navigation and the FSS with a secondary allocation to the LMSS. The Radio-Navigation service is the use of RADAR for navigation. An example of Radio-Navigation is the ground proximity radar used for airplane collision avoidance. FSS stands for the Fixed Satellite …
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Development And Characterization Of Beamforming Antenna Systems
… a single source and frequency selective surface (FSS) is proposed (chapter 2) and investigated. Since the FPC antenna system removes complicated feedline mechanism in array antenna system, it gains high interest to provide higher directivity/gain. Different FSS unit cell geometry and sources are …
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Spectral Signature Modification By Application Of Infrared Frequency-selective Surfaces
… is known as frequency selective surface (FSS) technology and is established in the millimeter-wave spectral regime, but is a challenging technology to scale for IR application. Incorporation of thin films and FSS antenna elements on a surface permits the signature of a surface to be …
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Obstacle avoidance robot applying fuzzy control system
… of aperture type frequency selective surface (FSS) has being proposed. In the present work, SnO2 thin film with FSS structure was fabricated using RF magnetron sputtering technique and printed circuit board technology. Deposition time, dissipation power and oxygen flow rate were varied during …
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Fabrication of frequency selective structure and evaluation of microwave transmission on energy saving glass
… of aperture type frequency selective surface (FSS) has being proposed. In the present work, SnO2 thin film with FSS structure was fabricated using RF magnetron sputtering technique and printed circuit board technology. Deposition time, dissipation power and oxygen flow rate were varied during …
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Fabrication of frequency selective structure and evaluation of microwave transmission on energy saving glass
… of aperture type frequency selective surface (FSS) has being proposed. In the present work, SnO2 thin film with FSS structure was fabricated using RF magnetron sputtering technique and printed circuit board technology. Deposition time, dissipation power and oxygen flow rate were varied during …
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