Abstract

Sensor applications for RFID systems received a lot of attention in the last years. Here a compact planar patch antenna that provides space for sensor elements and their connection network is presented. The proposed antenna is built up from a standard patch antenna, shortened by through-holes at two edges and has an opening in the patch metallization for placing sensor components. Placed on a metal surface the antenna behaves as a patch antenna, and in free space it has the radiation pattern of a dipole antenna.

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