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This chapter deals with the designing strategy and process integration for a small On-ChipAntenna (OCA) with a small Radio Frequency Identification (RFID) tag on a chip-area 0.64 x 0.64 mm at 2.45 GHz for communication in near field. On the other hand, communication between Reader device and set of OCA-Tag is based on inductive coupling. Embedded antenna is an important step down into the route of miniaturisation. A special micro-galvanic process that can take place on a normal CMOS wafer makes it possible. The coil could be placed directly onto the isolator of the silicon chip in the form of a planar (single layer) spiral arrangement and contacted to the circuit below by means conventional openings in the passivation layer (e.g., Usami, 2004). Dimension of the conductor flows in the range of 5-10 μm with a layer thickness of 15-30 μm (Finkenzeller, 2003).

Near Field On Chip RFID Antenna Design