8/6/2019 1-Wireless Power Transmission

http://slidepdf.com/reader/full/1-wireless-power-transmission 1/1

Afraz Haider, Jonathan Arifin, Muhammad Jivani, Karan Kataria,

Sesh Andavolu, Ziad Ghneim

Department of Electrical Engineering

Erik Jonsson School of Engineering & Computer Science

University of Texas at Dallas

Richardson, Texas 75083-0688, U.S.A.

Project Goals: Project Results:

 

Project Overview:

Project Conclusions/Outcomes:

To improve our design for effective wireless power transmissions

utilizing 915 MHz ISM-band source frequency which is compatible with

commercial devices.

Based on our research and preliminary experimental verification, we

will built a multiple stage (Five Stage) wireless charger capable of 

acquiring and converting 915 MHz source frequency into usable DC

power. By the end of second phase of our design project, it is our goal to

power a small device wirelessly with our proposed circuit design.

For Senior Design II, we decided to revise our 

rectenna design by building a Five Stagewireless charger pump for acquiring optimum

DC load. Based on our research, 915 MHz

source frequency best served our purpose in

achieving our goal of obtaining usable DC power 

at the output load.

Timeline

Our research and detailed study regarding different aspects of RF rectifying

circuit such as microstr ip and patch antenna design helped us gain a better 

understanding of the formulation and layout for a charging circuit.

Based on our research and guidance from the UTD faculty members, wedesigned a Five Stage wireless charging circuit and simulated it on AWR

software. The simulation displayed an efficiency of 50%? Using PCB 64 millimeter board, we then constructed a Five Stage wireless

charging circuit capable of functioning for 915 MHz operations. Our design

of the wireless charger circuit consisted of two quarter wave whip

antennas for transmitting and receiving purposes that were impedance

matched to Schottky diodes and other lumped elements.

 

Using the new design, we received a better output power. Successfully simulated our rectenna design in AWR Microwave Office and

VSS environment. Successfully completed the design and layout of the circuit on the

PCB board. Sufficiently rectified Radio Frequencies from an antenna . The projects results indicated that we can achieve much better efficiency

by utilizing better antennas. Overall, it was a useful learning experience that helped us gain knowledge

related to wireless power applications.

Topics Month

Researched and held various team meetings for improving our overall rectenna design.

May

Started work on redesigning the charging circuit, using adifferent transmitting frequency (915 MHz) and submitted a listof parts that needed to be ordered to the instructor.Continued our research and consulted with various professorsand TAs for professional viewpoints.Started the simulation on AWR for the rectenna design.

June

Completed the simulation using AWR.Finished the layout and design of the charging circuit.Implemented our circuit on the microstrip board.Tested the circuit.

July