AN INTERDIGITATED PRINTED ANTENNA FOR PC CARD APPLICATIONS

A quarter-wavelength diversity patch configuration for the 2.4-GHz ISM band PC card application is reported. The structure is based on partl y interdigitation of two quarter wavelength separated patches through a set of fingers for achieving the required space diversity on single side printed substrate with an easy matching on 50 Ohm, high cross pol arization and within a given maximum space of 30 mm x 50 mm, Measured antenna patterns for a developed structure are the same as for a class ical patch and the bandwidth for a VSWR less than two is 2% with a max imum gain of 1.5 dB. This antenna has been incorporated in a high-spee d wireless LAN PC card system.