Title :
Demonstration of Impedance Matching Using a mu-Negative (MNG) Metamaterial
Author :
Greegor, Robert B. ; Parazzoli, Claudio G. ; Nielsen, Jean A. ; Tanielian, Minas H. ; Vier, D.C. ; Schultz, S. ; Holloway, Christopher L. ; Ziolkowski, Richard W.
Author_Institution :
Boeing Phantom Works, Seattle, WA
fDate :
7/1/1905 12:00:00 AM
Abstract :
A mu-negative (MNG) metamaterial hemisphere was used to demonstrate impedance matching for a magnetic loop. The metamaterial was comprised of copper spirals deposited on an alumina substrate. The spirals, hemisphere, and magnetic loop were designed to operate at ~450 MHz. The effect of the metamaterial hemisphere was to improve the match of the electrically small loop antenna to the power source impedance increasing the overall radiated power. Results show a 17-dB increase in total radiated power relative to the bare loop. This was lower than anticipated due to losses in the MNG hemisphere.
Keywords :
UHF antennas; impedance matching; metamaterials; alumina substrate; copper spirals; impedance matching; magnetic loop; metamaterial hemisphere; mu-negative metamaterial; power source impedance; Antenna; electrically small; magnetic loop; metamaterial;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2008.2011570
