Summary
International Symposium on Antennas and Propagation
2010
Session Number:2WC1
Session:
Number:2WC1-10
The Radiation Characteristics of a Linear Phased Array Antenna using Inductor Loaded Patch Antennas
Tae-Young Kim, Gun-Su Kim, Boo-Gyoun Kim,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
To obtain high gain and wide bandwidth, electrically thick substrates are used in microstrip patch antennas. The increase in substrate thickness, however, tends to increase surface waves. A microstrip patch antenna has a strong radiation along the horizontal plane. To reduce the radiation in the horizontal plane, the technique by placing shorting pins between the patch and the ground has been investigated [3]. The excitation of surface waves and radiation in the horizontal plane lead to enhance the mutual coupling between antenna elements, which results in the decrease of the side lobe level (SLL) and the variation of the main beam gain for the variation of the main beam direction. The electromagnetic band gap (EBG) structures are applied to the phased array antenna (PAA) to improve the performance [4, 5]. This paper proposes the use of an inductor loaded patch antenna as an antenna element of PAAs in order to improve their radiation characteristics by the suppression of mutual coupling. We investigate the radiation characteristics of PAAs with an inductor loaded patch antenna as an antenna element by experiment and simulation using HFSS (High Frequency Structure Simulator). Section 2 presents the design parameters used for two different types of PAAs. In section 3, simulated and experimental results on the performance of a conventional PAA and an inductor loaded patch PAA are presented and compared. Finally, section 4 concludes this paper.