Low-Profile Dual-Frequency GPS Patch Antenna Enhanced with Dual-Band EBG Structure

TitleLow-Profile Dual-Frequency GPS Patch Antenna Enhanced with Dual-Band EBG Structure
Publication TypeJournal Article
Year of Publication2007
AuthorsBao, XL, Ruvio, G, Ammann, MJ
Journal TitleMicrowave and Optical Technology Letters
Volume49
Issue11
Pagination2630-2634
Journal Date11/2007
Abstract

A novel low-cost low profile dual-frequency circularly polarized patch antenna for GPS applications is presented. By stacking two square patches with truncated corners on a two-layer fractal electromagnetic bandgap structure, the coverage of the entire GPS bandwidth is achieved. Two bandgaps exist for the proposed fractal EBG structure, from 1.16GHz to 1.32GHz and from 1.45Ghz to 2.10Ghz, which include the lower frequency band and upper frequency band of the proposed dual-frequency GPS antenna. the antenna is very low-profile and has significant improvement in gain and axial ratio bandwidth, as well as broader bandwidths compared to the same two-layer GPS antenna without EBG. Good circularly polarized radiation patterns are realized. Measurements on prototypes are in good agreement with simulation.

URLhttp://www3.interscience.wiley.com/cgi-bin/fulltext/115805868/PDFSTART
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