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 energy harvesting"”.
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RF energy harvesting using carbon nanotube components
This thesis investigates the feasibility of a RF energy harvester using carbon-nanotube (CNT) transistors. The Cockcroft-Walton (CW) multiplier, a passive voltage multiplier topology, is chosen to turn AC RF energy into a usable DC voltage. This topology is first analyzed by hand in order to …
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Distribution power level by GSM900 base station for RF energy harvesting
… in rectifiers able to converse radio frequency (RF) energy to DC (direct current) power is an evidence of achievement in the field of electronic microwave. With the rapid development in the field of wireless communications the density of microwave energy become higher and allows the microwave …
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Radio Frequency Energy Harvesting Sensor Node Prototype Design
… new mode for powering these devices is through energy harvesting; specifically, radio frequency (RF) energy harvesting poses a number of advantages when compared to other modes of powering low-power low-duty cycled devices. This thesis work proposes a sensor node device design based on RF energy …
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Asic Design of RF Energy Harvester Using 0.13UM CMOS Technology
… replacement or need to be removed for charging. RF energy harvesting technology can be used to charge these batteries without the need to remove the battery from the device, thus providing a sustainable power supply. In other cases, a battery can become unnecessary altogether. This enables us to …
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Transceiver design for wireless energy harvesting cooperative networks
In this thesis, the RF energy harvesting technique is studied in the cooperative wireless network, and different optimization studies are investigated. First, an energy-efficient optimization is considered in the cooperative system with the time switching relaying and power splitting relaying …
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A Power-efficient Radio Frequency Energy-harvesting Circuit
… the design and simulation of a Radio Frequency (RF) energy-harvesting circuit, from receiving antenna to the point of charge collection. The circuit employs a custom-designed antenna based around Koch fractal loops, selected for their small physical size, good multiband behaviour and ease of size …
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Batteryless RF transceiver for wireless sensor networks
… in the last few years. In this work a complete RF transceiver for WSN applications is presented, which includes a RF energy harvesting system, a power management unit and a RF front end. The transceiver is able to operate by scavenging the required DC power from the incoming RF signal, thus …
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Wireless Information and Power Transfer Methods for IoT Applications
… Future IoT devices will require a ubiquitous energy source and will need to be capable of low power communication. RF energy can be harvested through ambient or dedicated RF sources to satisfy this energy demand. In addition, these RF signals can be modified to convey information. This thesis …
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Wireless, Battery-Free, High-Sensitivity 5G RF Energy Harvesters for Next Generation IoT Sensor Tags
… of battery-free IoT devices powered by ambient energy harvesting has gained significant attention. Among various energy-harvesting technologies, radio frequency (RF) energy harvesting has emerged as a promising solution for powering IoT devices. By harvesting energy from ambient RF signals in …
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Modelling and simulation of wireless information and power exchange protocol with power splitting for energy sustainability in device-to-device communications
… splitting as well as displays the power and energy consumed by each node. It is suggested, when the nodes are not sending any message, they can go into sleep mode to save energy. The nodes only wake up when they want to send or communicate with other nodes. In this study, the RF energy …
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Microstrip patch array rectenna with harmonic suppression capability for energy harvesting application
… patch array rectenna for Radio Frequency (RF) energy harvesting at 2.45 GHz. Energy harvesting is a process where energy is derived from external sources which is captured and converted into power supply. External source being used in this research is RF energy. Rectenna is a combination of …
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UHF Energy Harvesting and Power Management
… unfortunately consume a significant amount of energy. This is undesirable for devices which are not directly connected to power. This is because these devices will essentially carry batteries to supply the needed energy for these operations and the batteries will eventually be depleted. This …
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Efficiency Improvement of RF Energy Transfer by a Modified Voltage Multiplier RF DC Converter
Radio Frequency (RF) energy transfer is getting increasingly importance in new generations of wireless sensor networks and this trend is tremendously supported by the modern trends to Internet of things (IoT). This promising technology enables proactive energy replenishment for wireless devices. …
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Variation resolutions for CMOS sensing networks
proposed circuits can be combined with other techniques including high-Q impedance matching for input voltage boosting and hierarchical tandem stages for further improvement on operating conditions. With a Q=10 matching network, -27 dBm sensitivity and 22% efficiency can be achieved for about 0.5 V …
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DESIGN AND ANALYSIS OF COGNITIVE MASSIVE MIMO NETWORKS WITH UNDERLAY SPECTRUM SHARING
… to not only achieving unprecedented spectral and energy efficiencies, but also to alleviating propagation losses and inter-user/inter-cell interference. Therefore, massive MIMO has been identified as one of the key candidate technologies for the 5th generation wireless standard. This dissertation …
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Demonstrační zařízení pro sklízení energie
Tato semestrální práce se zabývá problematikou sklizně elektromagnetické energie. Popisuje jednotlivé části řetězce, které jsou podstatné pro zpracování vysokofrekvenční energie. Rozebírá možnosti řešení a jejich vlastnosti. Cílem této práce je návrh vhodné antény s pomocnými obvody pro komerčně …