Title :
Radiation characteristics of microstrip dipole antennas over a high-impedance metamaterial surface made of Hilbert inclusions
Author :
McVay, J. ; Hoorfar, A. ; Engheta, N.
Author_Institution :
Dept. of Electr. & Comput. Eng., Villanova Univ., PA, USA
Abstract :
We analyze numerically the radiation characteristics of center-fed microstrip short dipoles and half-wave dipoles near a high-impedance surface made of Hilbert shape flat inclusions. We study the input impedance, pattern and gain of such radiating structures. We show that the radiation resistance of a microstrip dipole increases noticeably at certain frequencies near the resonant frequency of the Hilbert surface. Moreover, antenna gain enhancement at certain frequencies is observed for all dipole sizes we have analyzed.
Keywords :
antenna radiation patterns; antenna theory; dipole antennas; electric impedance; method of moments; microstrip antennas; Hilbert shape flat inclusions; Hilbert surface resonant frequency; antenna gain enhancement; center-fed microstrip short dipoles; gain; half-wave dipoles; high-impedance surface; input impedance; radiation characteristics; radiation pattern; radiation resistance; Conductors; Dipole antennas; Magnetic materials; Metamaterials; Microstrip antennas; Resonant frequency; Scattering; Shape; Surface impedance; Surface resistance;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1211007
