A novel 1.5 '' quadruple antenna for tri-band GPS applications

Abstract

A new GPS antenna is proposed to cover the three GPS bands (L1, L2 and L5 namely 1575MHz, 1227MHz and 1176MHz) with the L5 band to be added after 2006. The developed antenna size is only 1.5”x1.5 ” in aperture corresponding to λ/7 x λ/7 (λ = free space wavelength) and λ/13 thick. Quadrature feeding is employed to ensure RHCP radiation. The final miniature antenna exhibits a gain greater than 2dBi, and to our knowledge this is the smallest such size for CP operation covering all three bands. Detailed parametric simulations leading to the best design along with measurements for the constructed antenna are presented. I.