UHF RFID antennas integrated on flexible substrate for health care environments

Most of RFID tags for radiofrequency identification applications are different among them since its design and fabrication process rely on intended application environment. Thus, RFID tag antennas should be made of materials suitable for its target application scenario allowing in the end, an efficient means for identification. In this paper, design and fabrication details of flexible RFID tags antennas is discussed, those tags were attached to a chip in order to measure the working area of the tags. Three prototypes of RFID antennas working in the UHF band of the spectrum were built by integrating it in Rogers RT/Duroid 5880 substrate which is flexible, can be easily finished and resist most chemicals used for printed circuit board fabrication, that is why is widely used for making antennas.