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 16 of 16 for “"RF components"”.
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Enabling Hybrid Optical-Microwave Space Communications with Optically Transparent RF Components Using Indium Tin Oxide (ITO)
… techniques and the design, fabrication, and performance of optically transparent antennas using Indium Tin Oxide (ITO) films on alkaline earth boro-aluminosilicate glass for transparent radio-frequency (RF) applications in space communication systems. Addressing the limitations of traditional …
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Topology optimization of metamaterials and applications to RF component design
… of the material properties. Additionally, the performance of these resonant structures is dependent on the orientation of the exciting electric and magnetic fields. When placed next to a device, the effects of mutual coupling usually lead to an undesirable performance of the combined structure, …
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Design and integration techniques for compact, wideband and multi-functional baluns
The prevalence of RF components in 5G communications and the ‘Internet of Things’ (IoT), has resulted in the integration of electronic devices into all facets of life. This has driven the need for RF components with smaller footprints, lower power consumption and less loss, while being more …
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Micromachined Components for RF Systems
Several fabrication techniques for surface micromachined 3-D structures have been developed for RF components. The fabrication techniques all have in common the use of epoxy patterning and subsequent metallization. Techniques and structures such as embedded conductors, epoxy-core conductors, a …
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Eigenspace Approach to Specific Emitter Identification of Orthogonal Frequency Division Multiplexing Signals
… signal. These differences may stem from imperfect radio frequency (RF) components such as filters and power amplifiers. However, the problem of identifying a wireless device through analysis of these key signal characteristics presents several difficulties from an algorithmic perspective. …
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Wireless Coupled Feed Structure for Additively Manufactured Conformal Antennas
… can be conformally printed directly onto 3D surfaces using conductive inks and dielectric pastes. Instance, the traditional antenna radomes that had the purpose of protecting the antenna on its inside can now become the antenna itself. With the components on the surface of the structure, …
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Integrated broadband microphotonic beamformer for adaptive nulling in smart antennas
… improving the wireless communication systems performance. Smart antennas are system that consist of antenna arrays capable of adaptively adjusting the beam pattern, thereby enhancing the desired signals (beam steering) and suppressing the interference signals (null steering), which is also known …
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Unilateral and multi-functional RF front-end filtering networks using spatiotemporally modulated resonators arrays
… stringent demands on radio-frequency front-ends (RFFEs) requiring compact, reconfigurable, and multi-functional RF components that can reduce size, weight, power, and cost (SWaP-C) of the RFFE while maintaining high spectral efficiency and adaptability to a wide range of frequency bands, operating …
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Differentially fed active antennas
… has grown radically, resulting in stringent performance requirement for RF components. Differential circuits are preferred choice in RFIC design due to its good noise immunity and low distortion characteristics. But it is observed that single ended PAs and LNAs are used for the feeding part …
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A Fully Monolithic 2.5 GHz LC Voltage Controlled Oscillator in 0.35 μm CMOS Technology
… low frequency analog IC technology, to implement RF components such as mixers, voltage controlled oscillators (VCOs), and low noise amplifiers (LNAs). Future mass-market RF links, such as BlueTooth, will require the potentially low-cost single-chip solutions that CMOS can provide. In order for …
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Architectures and system design for digitally-enhanced antenna arrays
… provide additional levels of convenience and performance over the fully analog counterparts, without specifically addressing the underlying design of the analog hardware aspects of the arrays. The class of digitally-enhanced hardware has recently emerged, wherein "digitally aware" design …
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Exploiting Spatial Degrees-of-Freedom for Energy-Efficient Next Generation Cellular Systems
… exploit the spatial diversity while avoiding performance degradation from correlated channels. The developed scheme considers the impact of both system data rate and effective power consumption on the PAPR during resource allocation. We also present a suboptimal joint subcarrier and power …
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DESIGN OF MONOLITHICALLY INTEGRATED RF-MEMS MULTI-FUNCTIONAL PASSIVES FOR HYBRID BEAMFORMING ARCHITECTURES IN BEYOND-5G AND 6G SCENARIOS
… complexity, the need of miniaturized, high-performance and broadband hardware components is still an open issue. Passive Radio Frequency (RF) components in MicroElectroMechanical-Systems technology (RF-MEMS) offer notable and broadband electrical performances, while maintaining the marked …
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A Novel Long-Range Passive UHF RFID System over Twisted-pair Cable
Radio Frequency Identification (RFID) is one of the most representative, rapidly growing, and highly extendable technologies, which uses electromagnetic waves in accordance with specific communications standards and regulations to identify, track, or even localise desired objects. However, due to …
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Electromagnetic Interference Attacks on Cyber-Physical Systems: Theory, Demonstration, and Defense
… a complex integration of hardware and software components to perform well-defined tasks. Up to this point, many software-based attacks targeting the network and computation layers have been reported by the researchers. However, the physical layer attacks that utilize natural phenomena (e.g., …
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DESIGN, SIMULATION AND OPTIMIZATION OF HIGH Q RF SPIRAL INDUCTORS ON SILICON CHIPS
… Si substrate makes the design of high Q passive components difficult. Although there have been many works done to find many methods to improve the Q factor, the optimization of the spiral inductors is a never end job, and there is a continually great incentive to design, optimize, and model …