1. Dual polarisation flat antennas for satellite tv reception;Rammos;16th ESA workshop on dual polarisation antennas, ESTEC Noordwijk, the Netherlands,1993
2. A low tolerance dual slot radiator for space and ground applications;Rammos;IEEE AP/S symposium, London, Ontario, Canada,1991
3. A novel high efficiency planar array for two orthogonal polarisations capability;Rammos;IEEE AP/S symposium, Boston, Massachusetts,1984
4. Johansson, F.: Analysis and design of double-layer frequency selective surfaces. IEE Proceedings on Microwaves, Antennas and Propagation, Pt. H. 132 (1985), 319–325.