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Analysis of Radiation Characteristics of Microstrip Patch Antennas Integrated with Mushroom-like EBG Structures  

Kwak, Eun-Hyuk (School of Electronic Engineering, Soongsil University)
Kim, Tae-Young (School of Electronic Engineering, Soongsil University)
Kim, Boo-Gyoun (School of Electronic Engineering, Soongsil University)
Publication Information
Abstract
Radiation characteristics of microstrip patch antennas integrated with mushroom-like EBG structures in all directions and length direction on a substrate with the relative dielectric constant of 10 are systematically analyzed. As the substrate thickness increases, the effect of the surface wave on the input impedance and radiation pattern of a patch antenna increases. The effect of EBG structures on the input impedance of a patch antenna is negligible when the distances between EBG structures and the center of a patch antenna are 0.4 ${\gamma}_0$, 0.2 ${\gamma}_0$ and 0.1 ${\gamma}_0$ for the substrate thickness of 3.2 mm, 1.6 mm and 0.8 mm, respectively. The forward radiation is improved due to the suppression of surface wave when the periods of EBG structures integrated are larger than 2, 2, 3 periods for the substrate thickness of 3.2 mm, 1.6 mm and 0.8 mm, respectively. The effects of EBG structures on the radiation characteristics of a patch antenna integrated with EBG structures in all directions and length direction are similar.
Keywords
Patch antenna; Mushroom-like EBG structure; Radiation characteristics; Surface wave; Bandgap;
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Times Cited By KSCI : 1  (Citation Analysis)
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