Premium
Probe‐fed microstrip antennas loaded with very high‐permittivity ceramics
Author(s) -
Hwang Y.,
Zhang Y. P.,
Lo T. K.
Publication year - 2006
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20165
Subject(s) - microstrip antenna , materials science , finite difference time domain method , microstrip , permittivity , dielectric , patch antenna , microwave , ceramic , relative permittivity , optoelectronics , antenna (radio) , acoustics , electronic engineering , optics , electrical engineering , composite material , computer science , engineering , physics , telecommunications
This article reports the feasibility study of miniaturizing probe‐fed microstrip patch antennas by dielectric loading. The loading materials are barium tetratitanate ceramics of very high dielectric constant (ε r = 38, 80). It is shown that, simply through loading, the antenna sizes are greatly reduced; however, the antenna performances are deteriorated. For instance, the antenna gain becomes lower. Then enhancement of the antenna performances follows. A substrate–superstrate structure is used to recover the gain. Both the experiments and the finite‐difference time‐domain (FDTD) simulations demonstrate that the gain and impedance bandwidth can be retrieved such that they are comparable to those of conventional microstrip antennas loaded with low permittivity materials (ε r < 3). © 2006 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2006.