This white paper describes how the nRF52832 Near Field Communication (NFC) antenna can be tuned.
A typical NFC system consists of two devices, an active and a passive device. The active device has a power source and induces a magnetic field with a coil inductor antenna. When the passive device is placed in this magnetic field, the varying magnetic field will induce current (power) in the passive device. The induced power in the passive device is used to retrieve and transmit data back to the active device.
An active device can also be called a poller, and a passive device can also be called a listener or a tag. The nRF52832 System on Chip (SoC) is an NFC tag device.