Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

You searched for subject:(RF rectifiers). Showing records 1 – 3 of 3 total matches.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


University of Florida

1. Tang, Chunming. Ultra Low Power Passive Transponders for Biomedical Microsystems.

Degree: PhD, Electrical and Computer Engineering, 2013, University of Florida

This dissertation examines several aspects of designing high-efficiency and low-power building blocks for passive microsystems used in biomedical applications. To reduce losses in the power conversion in voltage multiplier, the architecture implements several types of Schottky diodes on standard CMOS processes. The Schottky diode provides a lower turn-on voltage, which minimizes the losses associated with the forward biased voltage drop. Utilizing the diode’s measured I-V characteristics, this dissertation proposes a new RF-DC voltage multiplier design procedure. This design method provides an overview of the voltage multiplier’s design parameters, including the diode sizing, number of stages, the RF-DC voltage multiplier’s input impedance, matching between antennas, and power conversion efficiency. A new calibration-free low-power clock generator is also presented. This clock generation scheme provides a clock frequency that is more stable against process, temperature, and voltage variations. This allows more reliable data decoding and encoding. Additionally, this dissertation also proposes a dual power supply RF-DC power management unit to minimize the clock generator’s power consumption and to improve the overall DC-DC voltage conversion efficiency. A novel passive transponder architecture is proposed, which minimizes overall chip area. All building blocks in the proposed transponder are designed to be operated from an AC power supply. With this architecture, the AC power supply not only powers the transponder but also provides a clock signal for the chip. This allows the architecture to eliminate area-consuming building blocks, such as an RF-DC multiplier, a decoupling capacitor, a voltage regulator, and a power-on-reset circuit. Finally,a battery-assisted transponder is presented. The transponder can use take the DC voltage at the input to improve the sensitivity. A radio transmitter is used in this proposed transponder to improve the communication range. The transponder can also operate by harvesting energy from electromagnetic wave if the DC voltage is not available at the input. The proposed transponder has both advantages of the active and passive transponder architectures. ( en ) Advisors/Committee Members: Bashirullah, Rizwan (committee chair), Harris, John Gregory (committee member), Lin, Jenshan (committee member), Batich, Christopher D (committee member).

Subjects/Keywords: Antennas; Capacitors; Diodes; Electric potential; Oscillators; Power efficiency; Rectifiers; Schottky diodes; Signals; Transponders; biomedical  – low-power  – multiplier  – rf-dc  – rfid  – transponder

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Tang, C. (2013). Ultra Low Power Passive Transponders for Biomedical Microsystems. (Doctoral Dissertation). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0045886

Chicago Manual of Style (16th Edition):

Tang, Chunming. “Ultra Low Power Passive Transponders for Biomedical Microsystems.” 2013. Doctoral Dissertation, University of Florida. Accessed May 19, 2019. http://ufdc.ufl.edu/UFE0045886.

MLA Handbook (7th Edition):

Tang, Chunming. “Ultra Low Power Passive Transponders for Biomedical Microsystems.” 2013. Web. 19 May 2019.

Vancouver:

Tang C. Ultra Low Power Passive Transponders for Biomedical Microsystems. [Internet] [Doctoral dissertation]. University of Florida; 2013. [cited 2019 May 19]. Available from: http://ufdc.ufl.edu/UFE0045886.

Council of Science Editors:

Tang C. Ultra Low Power Passive Transponders for Biomedical Microsystems. [Doctoral Dissertation]. University of Florida; 2013. Available from: http://ufdc.ufl.edu/UFE0045886


Texas A&M University

2. Abouzied, Mohamed Ali Mohamed. RF Power Transfer, Energy Harvesting, and Power Management Strategies.

Degree: 2017, Texas A&M University

Energy harvesting is the way to capture green energy. This can be thought of as a recycling process where energy is converted from one form (here, non-electrical) to another (here, electrical). This is done on the large energy scale as well as low energy scale. The former can enable sustainable operation of facilities, while the latter can have a significant impact on the problems of energy constrained portable applications. Different energy sources can be complementary to one another and combining multiple-source is of great importance. In particular, RF energy harvesting is a natural choice for the portable applications. There are many advantages, such as cordless operation and light-weight. Moreover, the needed infra-structure can possibly be incorporated with wearable and portable devices. RF energy harvesting is an enabling key player for Internet of Things technology. The RF energy harvesting systems consist of external antennas, LC matching networks, RF rectifiers for ac to dc conversion, and sometimes power management. Moreover, combining different energy harvesting sources is essential for robustness and sustainability. Wireless power transfer has recently been applied for battery charging of portable devices. This charging process impacts the daily experience of every human who uses electronic applications. Instead of having many types of cumbersome cords and many different standards while the users are responsible to connect periodically to ac outlets, the new approach is to have the transmitters ready in the near region and can transfer power wirelessly to the devices whenever needed. Wireless power transfer consists of a dc to ac conversion transmitter, coupled inductors between transmitter and receiver, and an ac to dc conversion receiver. Alternative far field operation is still tested for health issues. So, the focus in this study is on near field. The goals of this study are to investigate the possibilities of RF energy harvesting from various sources in the far field, dc energy combining, wireless power transfer in the near field, the underlying power management strategies, and the integration on silicon. This integration is the ultimate goal for cheap solutions to enable the technology for broader use. All systems were designed, implemented and tested to demonstrate proof-of concept prototypes. Advisors/Committee Members: S?nchez-Sinencio, Edgar (advisor), Enjeti, Prasad (committee member), Palermo, Sam (committee member), El-Halwagi, Mahmoud (committee member).

Subjects/Keywords: Tunable; Integrated CMOS; matching network; performance limits; RF energy harvesting; sensitivity; steady-state analysis; low-input energy-harvesting front end; power-level energy-harvesting front end; CMOS RF energy-harvesting front end; LC matching networks; RF rectifiers; RF energy-harvesting sensitivity; off-chip matching network; on-chip matching network; ultralow power; Charge pump; clamper; CMOS; compensation rectifier; controller; dual-path energy; extra energy; fully integrated; Internet of Things; LC matching; nonoverlapping cross-coupled level shifters; portable; power management; reconfigurable; RF energy harvesting; RF rectifier; self-sustainable; stages; storage capacitor; cross-coupled RF Rectifier; Diode-connected RF Rectifier; nonlinear analysis; energy recycling; transceivers; blocker harvesting; Integrated CMOS; multiple-input; energy harvesting; self-startup; switched capacitor; power conversion efficiency; solar; dc combiner; clampers; doublers; microwave amplifier; switched capacitor modeling; ac to dc; differential thyristor-based oscillators; tuning wireless power transmitters; multiple coils; near-field, watt-level; inductive link

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Abouzied, M. A. M. (2017). RF Power Transfer, Energy Harvesting, and Power Management Strategies. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/161309

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Abouzied, Mohamed Ali Mohamed. “RF Power Transfer, Energy Harvesting, and Power Management Strategies.” 2017. Thesis, Texas A&M University. Accessed May 19, 2019. http://hdl.handle.net/1969.1/161309.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Abouzied, Mohamed Ali Mohamed. “RF Power Transfer, Energy Harvesting, and Power Management Strategies.” 2017. Web. 19 May 2019.

Vancouver:

Abouzied MAM. RF Power Transfer, Energy Harvesting, and Power Management Strategies. [Internet] [Thesis]. Texas A&M University; 2017. [cited 2019 May 19]. Available from: http://hdl.handle.net/1969.1/161309.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Abouzied MAM. RF Power Transfer, Energy Harvesting, and Power Management Strategies. [Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/161309

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Universidad de Cantabria

3. Ruiz Lavín, María de las Nieves. Diseño de topologías rectificadoras e inversoras clase E basadas en tecnologías GaN HEMT y E-pHEMT para aplicaciones de transmisión inalámbrica y reciclado de energía. Design of rectifying and inverter class E topologies on GaN and E-pHEMT devices for wireless powering and energy harvesting applications.

Degree: Departamento de Ingeniería de Comunicaciones, 2017, Universidad de Cantabria

In the RF/Microwave field, efficient wireless transmission systems are being developed in order to reduce base stations electric consumption, extend battery lifetime in handsets, as well as to remotely power up wireless devices by means of wireless powering transmission (WPT) or even energy harvesting solutions. In this sense, high efficient inverter and rectifier topologies, operating in class E, have been proposed in this thesis to be used on wireless communications and WPT. On the one hand, high-efficiency power amplifiers based on GaN HEMT technology, have been designed, which were used as a part of outphasing transmitters afterwards. In addition, using GaN HEMT amplifiers and synchronous rectifiers, Class E2 DC/DC converters have been designed, to be used as envelope modulators in ET/EER architectures. On the other hand, synchronous rectifiers with E-pHEMT technology, focused on far-field power transfer and energy harvesting applications, have been designed. State-of-the-art efficiencies have been measured in some implementations. Advisors/Committee Members: [email protected] (authoremail), false (authoremailshow), García García, José Ángel (director), true (authorsendemail).

Subjects/Keywords: Alta-eficiencia; Amplificador de potencia; Auto-alimentación; Auto-síncrono; Clase-E; EER; E-pHEMT; ET; GaN HEMT; Inversor; Microondas; Transmisor outphasing; Radiofrecuencia; Rectenna; Convertidor DC/DC Resonante; Rectificador síncrono; UHF; Comunicaciones inalámbricas; Alimentación inalámbrica; Reciclado de energía; WPT; Class-E, EER; Energy harvesting; High-efficiency; Inverter; Microwaves; Outphasing transmitter; Power amplifier; Radiofrequency; Resonant DC/DC converter; Self-biasing; Self-synchronous; Synchronous rectifiers; Wireless communications; Wireless powering; Grupo de RF y Microondas; 62; 621.3

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Ruiz Lavín, M. d. l. N. (2017). Diseño de topologías rectificadoras e inversoras clase E basadas en tecnologías GaN HEMT y E-pHEMT para aplicaciones de transmisión inalámbrica y reciclado de energía. Design of rectifying and inverter class E topologies on GaN and E-pHEMT devices for wireless powering and energy harvesting applications. (Thesis). Universidad de Cantabria. Retrieved from http://hdl.handle.net/10803/405798

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Ruiz Lavín, María de las Nieves. “Diseño de topologías rectificadoras e inversoras clase E basadas en tecnologías GaN HEMT y E-pHEMT para aplicaciones de transmisión inalámbrica y reciclado de energía. Design of rectifying and inverter class E topologies on GaN and E-pHEMT devices for wireless powering and energy harvesting applications.” 2017. Thesis, Universidad de Cantabria. Accessed May 19, 2019. http://hdl.handle.net/10803/405798.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Ruiz Lavín, María de las Nieves. “Diseño de topologías rectificadoras e inversoras clase E basadas en tecnologías GaN HEMT y E-pHEMT para aplicaciones de transmisión inalámbrica y reciclado de energía. Design of rectifying and inverter class E topologies on GaN and E-pHEMT devices for wireless powering and energy harvesting applications.” 2017. Web. 19 May 2019.

Vancouver:

Ruiz Lavín MdlN. Diseño de topologías rectificadoras e inversoras clase E basadas en tecnologías GaN HEMT y E-pHEMT para aplicaciones de transmisión inalámbrica y reciclado de energía. Design of rectifying and inverter class E topologies on GaN and E-pHEMT devices for wireless powering and energy harvesting applications. [Internet] [Thesis]. Universidad de Cantabria; 2017. [cited 2019 May 19]. Available from: http://hdl.handle.net/10803/405798.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ruiz Lavín MdlN. Diseño de topologías rectificadoras e inversoras clase E basadas en tecnologías GaN HEMT y E-pHEMT para aplicaciones de transmisión inalámbrica y reciclado de energía. Design of rectifying and inverter class E topologies on GaN and E-pHEMT devices for wireless powering and energy harvesting applications. [Thesis]. Universidad de Cantabria; 2017. Available from: http://hdl.handle.net/10803/405798

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.