Microstrip antennas and arrays on photonic band gap substrates

Author

Sudha, T ; Vedavathy, T.S.

Author_Institution

Dept. of Electr. Commun. Eng., Indian Inst. of Sci., Bangalore, India

Volume

1

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

105

Abstract

Patch antennas have some limitations such as restricted band-width of operation, low gain and a potential decrease in radiation efficiency due to surface wave losses. In this paper, the ability of a photonic band gap (PBG) substrate to minimize the surface wave effects is analyzed for a thick and high ε_r substrate. Two different types of PBGs are used, one the conventional dielectric PBG and the other a metallodielectric PBG. The PBG patch antenna showed significantly reduced levels of surface modes compared to conventional patch antenna, thus improving the gain and far-field radiation pattern. The results also showed that introducing metallic cylinders in dielectric crystals is more effective in suppressing side lobe radiation. The performance improvement of a two-element array of patches on the PBG substrate is also analyzed.

Keywords

antenna accessories; antenna radiation patterns; microstrip antenna arrays; photonic band gap; PBG substrate; dielectric PBG; dielectric crystals; far-field radiation pattern; gain; metallic cylinders; metallodielectric PBG; microstrip antennas; microstrip antennas arrays; patch antenna; patch antennas; photonic band gap substrates; radiation efficiency; side lobe radiation; surface modes; surface wave effects; surface wave losses; two-element array; Antenna radiation patterns; Crystals; Dielectric substrates; Microstrip antenna arrays; Microstrip antennas; Optical losses; Patch antennas; Performance analysis; Photonic band gap; Surface waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Optoelectronics Conference, 2001. IMOC 2001.Proceedings of the 2001 SBMO/IEEE MTT-S International

Print_ISBN

0-7803-7065-1

Type

conf

DOI

10.1109/SBMOMO.2001.1008729

Filename

1008729