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Radial EBG cell layout for GPS patch antennas

Radial EBG cell layout for GPS patch antennas

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A novel radial layout for mushroom-like electromagnetic-bandgap (EBG) cells surrounding a printed circularly-polarised patch antenna is proposed. Two radial EBG configurations surrounding a circular patch are compared to a reference patch on a conventional ground plane of the same dimension. The radial shape and displacement of the EBG cells around the patch offers improvements in terms of gain and axial-ratio compared to the reference antenna and is more suitable for circular geometries compared to conventional Cartesian layouts. In particular, the distance between the patch and the surrounding EBG cells is independent of the cell period, which can be arbitrarily chosen, and the overall layout offers footprint reduction.

References

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    2. 2)
      • M. Rahman , M.A. Stuchly . Circularly polarised patch antenna with periodic structure. IEE Proc., Microw. Antennas Propag. , 3 , 141 - 146
    3. 3)
      • R. Baggen , M. Martinez-Vazquez , J. Leiss , S. Holzwarth , L.S. Drioli , P. de Maagt . Low profile GALILEO antenna using EBG technology. IEEE Trans. Antennas Propag. , 3 , 667 - 674
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    6. 6)
      • Ruvio, G., Ammann, M.J.: `EBG mushroom-like structures for enhancing axial-ratio performance of CP antennas', 1stInt. Cong. on Advanced Electromagnetic Materials for Microwaves and Optics, 2007, Rome, Italy, p. 727–730.
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