FCC Compliance

What Is FCC Compliance?

FCC complianceFCC complianceUS RF emissions regulations for NFC devices (Part 15/18)View full → refers to meeting the regulatory requirements of the United States Federal Communications Commission for NFC devices that emit radio frequency energy. Since NFC operates at 13.56 MHz using electromagnetic fields, all NFC devices sold or operated in the US must demonstrate compliance with the applicable FCC rules before they can be legally marketed. FCC compliance ensures that NFC devices do not cause harmful interference to other radio services.

Applicable FCC Rules

NFC devices fall under two primary sections of the FCC's rules:

Most commercial NFC products (NFC-enabled devices, readers, and terminals) are regulated under Part 15 as intentional radiators. The 13.56 MHz operating frequency falls within the ISM band, which provides certain allowances for NFC devices.

Part 15 Requirements

Under FCC Part 15, NFC devices must comply with:

Emission limits. The device must not exceed specified field strength limits at a defined measurement distance. For 13.56 MHz NFC devices, the limit is typically measured in millivolts per meter (mV/m) at 30 meters from the device.

Spurious emissions. In addition to the fundamental 13.56 MHz signal, the device must not emit excessive energy at harmonic frequencies (27.12 MHz, 40.68 MHz, etc.) or other spurious frequencies.

Operating conditions. The device must comply with emission limits under all normal operating conditions, including different tag loading scenarios and various operating modes.

FCC vs International Regulations

NFC devices sold internationally must comply with the regulations of each target market:

While the technical requirements are broadly similar (all regulate emissions at 13.56 MHz), the specific limits, test methods, and filing procedures differ. Manufacturers targeting global markets must obtain compliance certification in each jurisdiction.

Practical Implications for NFC Products

Antenna design impacts emissions. A larger antenna or higher reader power increases the RF emissions footprint. Antenna designers must balance read range requirements against FCC emission limits.

Shielding and filtering. Some NFC readerNFC readerActive device generating RF field to initiate communication with tagsView full → designs require RF shielding or harmonic filters to suppress spurious emissions below FCC limits, particularly at the second and third harmonics of 13.56 MHz.

Product modifications. Changes to the antenna, NFC controller, or enclosure that affect RF emissions may require re-testing for FCC compliance. Manufacturers must maintain compliance across hardware revisions.

Consumer devices. Smartphones with NFC undergo comprehensive FCC testing as part of their overall radio certification, which also covers cellular, Wi-Fi, and Bluetooth emissions. The NFC portion is typically a small part of the total compliance effort.