Summary
International Symposium on Antennas and Propagation
2010
Session Number:2WA2
Session:
Number:2WA2-6
Effect of Substrate Thickness on the Radiation Characteristics of Inductor-loaded Patch Antenna
Hyun-Woo Cho, Tae-Young Kim, Boo-Gyoun Kim,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
Microstrip patch antennas have many merits such as small size, light weight, low profile, and low cost [1]. Major disadvantages of microstrip patch antennas are their low efficiency and very narrow bandwidth. The increase of substrate thickness could improve the efficiency and bandwidth [2]. However, as the substrate thickness increases, surface waves increase which usually are not desirable [3]. The strong radiation along the horizontal plane is introduced by the polarization currents in the dielectric substrate underneath the patch. The technique for reducing the radiation by compensating the effect of the substrate using the insertion of a pin array between the patch and the ground has been presented in Ref. [4]. The inductive currents along the pins cancel out the polarization currents. The antenna using this technique behaves almost like being in the air. In this paper, we investigate the effect of substrate thickness on the radiation characteristics of an inductor-loaded patch antenna for several substrate thicknesses by simulation using HFSS (High Frequency Structure Simulator) and experiment.