Title :
Design and Experimental Verification of a 3D Magnetic EZ Antenna at 300 MHz
Author :
Ziolkowski, Richard W. ; Lin, Chia-Ching ; Nielsen, Jean A. ; Tanielian, Minas H. ; Holloway, Christopher L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Arizona, Tucson, AZ, USA
fDate :
7/1/1905 12:00:00 AM
Abstract :
Several variations of a 300-MHz version of the electrically small coax-fed three-dimensional (3D) magnetic EZ antenna were designed and tested. The final version of this low-profile antenna had an electrical size that was ka ~ 0.437 at 300.96 MHz. Nearly complete matching to the 50-Omega source and high overall efficiency (nearly 100%) were achieved. The measured fractional bandwidth was approximately 1.66%. The numerically predicted and the measured results were in good agreement. Comparisons to similar-sized loop antennas that were matched to the source with both custom-made and commercially available, general purpose external matching networks confirm the performance enhancements achieved with this metamaterial-inspired, near-field resonant parasitic antenna.
Keywords :
UHF antennas; VHF antennas; antenna feeds; antenna testing; loop antennas; metamaterials; numerical analysis; coax-fed 3D magnetic EZ antenna; fractional bandwidth; frequency 300 MHz; matching networks; metamaterial-inspired resonant parasitic antenna; near-field resonant parasitic antenna; similar-sized loop antennas; Antenna theory; electrically small antennas; metamaterials; parasitics; quality factors;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2009.2029708
