Planar inverted-F antennas loaded with very high permittivity ceramics
Article first published online: 2 MAR 2004
Copyright 2004 by the American Geophysical Union.
Volume 39, Issue 2, April 2004
How to Cite
2004), Planar inverted-F antennas loaded with very high permittivity ceramics, Radio Sci., 39, RS2002, doi:10.1029/2003RS002939., , and (
- Issue published online: 2 MAR 2004
- Article first published online: 2 MAR 2004
- Manuscript Accepted: 31 DEC 2003
- Manuscript Revised: 5 DEC 2003
- Manuscript Received: 15 JUL 2003
- planar inverted-F antennas;
- very high permittivity materials;
- FDTD methods
 With reference to a conventional air planar inverted-F antenna this paper describes the miniaturization of the planar inverted-F antenna by dielectric loading of barium tetratitanate ceramics of very high permittivity (εr = 38, 80) at 1.8 GHz. It is found that a simple loading method can reduce the antenna size but at the cost of the antenna performance. For instance, the antenna gain becomes lower. Then a sophisticated loading approach based on a novel substrate-superstrate structure is developed to improve the antenna gain. The whole process of the gain enhancement is analyzed by using the finite difference time domain method. The simulations are excellently correlated with the experiments. They both show that the sophisticated loading technique can reduce the antenna size by four times and still maintains the comparable performance.