Abstract:
This work consists of a contribution to the modeling and the conception of dielectric resonator
antennas with application to the realization of reconfigurable antenna. The dielectric resonator
antennas are important antenna for the flexibility and the ease of integration in wireless
systems (WLAN), where they allow to use several shapes (rectangular, triangular,etc) and
several power supplies (coupling slot, coaxial cable,etc.). We are also interested by the
coupling effect due to the presence of another antenna or a presence of a coupling slot. The
calculated program based on the FDTD method to modeling a dielectric resonator antenna, we
enable to calculate the reflection coefficient, the input impedance electrical and the magnetic
fields. The HFSS simulator is used to validate these results. Then, this study has been
extended to the conception and the fabrication of a reconfigurable dielectric resonator
antenna. For this purpose, we studied and simulated a reconfigurable antenna structure by
using two simulator (HFSS, CST), then we proposed another structure which is a triangular
reconfigurable dielectric resonator antenna simulated by CST simulator and fabricated in RF
laboratory, of the National Institute of Scientific Research, INRS, Canada. The numerical
results are presented in terms of the reflection coefficient, radiation pattern, gain, and
efficiency. In addition, we have studied an dielectric resonator antenna with reconfigurable by
diodes PIN. Two distinct radiation patterns were obtained by maintaining the same resonance
frequency, which shows that the insertion of electrically-driven semiconductor components
into the antenna base structure provides an effective means for reconfigurability of the
radiation
