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Low-profile dual-frequency GPS patch antenna enhanced with dual-band EBG structure

✍ Scribed by X. L. Bao; G. Ruvio; M. J. Ammann

Publisher: John Wiley and Sons
Year: 2007
Tongue: English
Weight: 361 KB
Volume: 49
Category: Article
ISSN: 0895-2477
DOI: 10.1002/mop.22815

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✦ Synopsis

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 substrate, the coverage of the entire GPS bandwidth is achieved. Two bandgaps exist for the proposed fractal EBG structure, from 1.16 to 1.32 GHz and from 1.45 to 2.10 GHz, which include the lower and upper frequency GPS band. The antenna is low‐profile and has improved gain and axial ratio bandwidth, as well as broader impedance bandwidths compared to the same antenna without EBG. Good circularly polarized radiation patterns are realized. Measurements on prototypes are in good agreement with simulation. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2630–2634, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22815

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