A new type of four-port, dual-frequency, and dual-polarization printed plan
ar antenna is described. As an example of application, a DECT + DCS 1800/WL
AN prototype has been realized and measured. Having the same dimensions as
a single SSFIP (strip-slot-foam inverted patch) antenna, it allows for pola
rization diversity over two frequency bands, with four independent ports pr
oviding a good isolation. (C) 1999 John Wiley & Sons, Inc.