  Near Field Communication (NFC) is a perfect example of ubiquitous computing
that is secured, short-ranged, low-powered contactless communication. High
demand is predicted for NFC, especially with wearables, and the variety of
applications may require that this technology be fabricated onto different
materials. In this research, we first designed flexible NFC antennas based on
mathematical models. A simulation of the NFC coil inductance was performed and
verified using the predictive models. Later, two flexible NFC antennas,
including 160x80 mm2 (rectangular) and 80x80 mm2 (square) were fabricated
through a chemical etching process and verified at 13.56 MHz frequency. Two
experiments 1) Read range detection and 2) User experience study on 22
participants validate longer read range and shorter connection time of our
fabricated flexible NFC tags.
