Title :
The influence of complex material coverings on the quality factor of simple radiating systems
Author :
Tretyakov, Sergei A. ; Maslovski, Stanislav I. ; Sochava, Alexander A. ; Simovski, Constantin R.
Author_Institution :
Radio Lab./SMARAD, Helsinki Univ. of Technol., Finland
fDate :
3/1/2005 12:00:00 AM
Abstract :
The influence of material coverings on the antenna quality factor is investigated for radiators formed by thin electric or magnetic line sources. It is shown that thin uniform and symmetric layers of arbitrary passive materials (including Veselago, left-handed, or double-negative materials) cannot help to overcome the bandwidth limitations imposed by the amount of energy stored in the antenna reactive field. Alternative possibilities offered by complex composite materials in the antenna design are identified.
Keywords :
Q-factor; antenna radiation patterns; metamaterials; microstrip antennas; antenna quality factor; complex antenna design; complex material coverings; electric-magnetic line sources; metamaterial; microstrip antenna; radiating systems; Bandwidth; Dipole antennas; Laboratories; Loaded antennas; Magnetic materials; Magnetic resonance; Magnetic separation; Microstrip antennas; Q factor; Space technology; Antennas; bandwidth; efficiency; metamaterial;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2004.842672
