Title :
Photonic band-gap materials for high-gain printed circuit antennas
Author :
Yang, Hung-Yu David ; Alexopoulos, Nicolaos G. ; Yablonovitch, Eli
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Illinois Univ., Chicago, IL, USA
fDate :
1/1/1997 12:00:00 AM
Abstract :
It is found through a vector integral-equation analysis and the reciprocity theorem that the gain of a microstrip antenna can be greatly enhanced with a photonic band-gap material layer either as the substrate or the superstrate. The beam angle is found to coincide with that of a leaky-wave mode of a planar-grating structure. This observation suggests that high gain is due to the excitation of strong leaky-wave fields
Keywords :
antenna radiation patterns; integral equations; microstrip antennas; photonic band gap; beam angle; directivity patterns; high gain; leaky-wave mode; microstrip antenna; photonic band-gap material layer; planar-grating structure; printed circuit antennas; reciprocity theorem; strong leaky-wave fields; substrate; superstrate; vector integral-equation analysis; Conducting materials; Crystalline materials; Dielectric substrates; Dipole antennas; Implants; Microstrip antennas; Photonic band gap; Photonic crystals; Printed circuits; Semiconductor materials;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
