Title :
UC-PBG Substrate for Planar Antennas
Author :
Coccioli, Roberto ; Ma, Kuang-Ping ; Itoh, Tatsuo
Author_Institution :
Electrical Engineering Department, University of California at Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095-1594, USA. e-mail: coccioli@ucla.edu
Abstract :
The recently developed Uniplanar Compact Photonic Bandgap (UC-PBG) substrate is used to reduce surface wave losses for an aperture-coupled fed patch antenna on a thick, high dielectric constant substrate. The surface wave dispersion diagram of a 50mil thick UC-PBG substrate has been numerically computed and found to have a complete stopband in the frequency range 11.4-12.8Ghz. A patch antenna working at 12GHz is built on the UC-PBG substate. Computed results and measured data show that the antenna mounted on the UC-PBG radiates a higher level of power in the broadside direction than the same antenna etched on a grounded dielectric slab with same thickness and dielectric constant Improvement of radiation pattern on both E-and H-plane is observed while cross-polarization remains 13dB down the copolar component level.
Keywords :
Antenna accessories; Dielectric losses; Dielectric substrates; Directive antennas; High-K gate dielectrics; Optical losses; Patch antennas; Photonic band gap; Planar arrays; Surface waves;
Conference_Titel :
Microwave Conference, 1999. 29th European
Conference_Location :
Munich, Germany
DOI :
10.1109/EUMA.1999.338552
