Download ANALYSIS OF AlUMINUM NITIRDE (AlN) AND GRADED

School of Electrical, Computer and Energy Engineering
M.S. Final Oral Defense
Wireless Power Transfer
by
Fernando Manfred Moreno
April 16, 2015
10:00 a.m.
GWC 409
Committee:
Dr. Rodolfo Diaz (chair)
Dr. James Aberle
Dr. Michael Kozicki
Abstract
A new loop configuration capable of reducing power radiation magnitudes lower
than conventional loops has been developed. This configuration is demonstrated for the
case of two coaxial loops of 0.1 meter radius coupled via the magnetic reactive field.
Utilizing electromagnetism theory, techniques from antenna design and a new near field
design initiative, the ability to design a magnetic field has been investigated by using a
full wave simulation tool. The method for realization is initiated from first order physics
model, ADS and onto a full wave situation tool for the case of a non-radiating helical
loop. The exploration into the design of a magnetic near field while mitigating radiation
power is demonstrated using an integer number of twists to form a helical wire loop
while biasing the loop in a non-conventional moebius termination. The helix loop setup
as a moebius loop convention can also be expressed as a shorted antenna scheme. The 0.1
meter radius helix antenna is biased with a 1MHz frequency that categorized the antenna
loop as electrically small. It is then demonstrated that helical configuration reduces the
electric field and mitigates power radiation into the far field. In order to compare the
radiated power reduction performance of the helical loop a shielded loop is used as a
baseline for comparison. The shielded loop system of the same geometric size and
frequency is shown to have power radiation expressed as -20.2 dBm. The power radiated
mitigation method of the helix loop reduces the power radiated from the two loop system
down to -138 dBm.