Taoglas FXC.35 Circular Form Factor Flexible Near Field Communications (NFC) Antennas are 13.56MHz circular antennas that are ideal for the Internet of Things (IoT), mobile devices, RFID systems, and more. Taoglas FXC.35 is flexible and low profile and features a 40mm typical interrogation distance. These 35mm diameter antennas are supplied with adhesive backing for quick and easy installation and can be mounted inside a plastic device enclosure or on an internal battery.