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

Volume

3

fYear

1999

fDate

Oct. 1999

Firstpage

158

Lastpage

161

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 1999. 29th European

Conference_Location

Munich, Germany

Type

conf

DOI

10.1109/EUMA.1999.338552

Filename

4139575