TY - GEN
T1 - Main beam deflection and gain enhancement in superstrate-based antenna systems
AU - Siddiqui, Omar
AU - Attia, Hussein
AU - Ramahi, Omar M.
PY - 2011
Y1 - 2011
N2 - The beam of an antenna can be controlled by placing high refractive index superstrates. In this paper, a plane-wave model of a microstrip antenna covered with a high refractive index is introduced. The antenna-superstrate system is analyzed by calculating its transmission response. When the patch is fully covered with the superstrate, the transmission response is truncated along the end-fire angles resulting in gain enhancement. On the other hand, when the superstrate partially covers the patch, a phase imbalance between the electromagnetic radiations emitted from the two radiating slots is produced. This imbalance causes the main beam to deflect from the broadside direction. Full-wave and plane-wave simulations show beam deflections close to 40 degrees. Tunable superstrates can thus be applied to steer the beam of a patch. Hence a novel method is introduced which has been traditionally done using multiple antenna elements with phase shifters.
AB - The beam of an antenna can be controlled by placing high refractive index superstrates. In this paper, a plane-wave model of a microstrip antenna covered with a high refractive index is introduced. The antenna-superstrate system is analyzed by calculating its transmission response. When the patch is fully covered with the superstrate, the transmission response is truncated along the end-fire angles resulting in gain enhancement. On the other hand, when the superstrate partially covers the patch, a phase imbalance between the electromagnetic radiations emitted from the two radiating slots is produced. This imbalance causes the main beam to deflect from the broadside direction. Full-wave and plane-wave simulations show beam deflections close to 40 degrees. Tunable superstrates can thus be applied to steer the beam of a patch. Hence a novel method is introduced which has been traditionally done using multiple antenna elements with phase shifters.
UR - https://www.scopus.com/pages/publications/80054980862
U2 - 10.1109/APS.2011.5996517
DO - 10.1109/APS.2011.5996517
M3 - Conference contribution
AN - SCOPUS:80054980862
SN - 9781424495634
T3 - IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
SP - 1262
EP - 1265
BT - 2011 IEEE International Symposium on Antennas and Propagation - Proceedings
ER -