Bao, X. L., Ruvio, G., and Ammann, M. J.,
“Low-Profile Dual-Frequency GPS Patch Antenna Enhanced with Dual-Band EBG Structure”,
Microwave and Optical Technology Letters, vol. 49, no. 11, pp. 2630-2634, 2007.
Ruvio, G. and Ammann, M. J.,
“Low-Profile Rolled Planar Antenna with Wide Bandwidth”, in
IEEE International Workshop on Antenna Technology: Small and Smart Antennas, Metamaterials and Applications, Cambridge, UK, 2007, pp. 77-80.