External NFC antennas with VTAP50
The VTAP50‑OEM has an option to snap off the on‑board antenna and connect an external antenna, with a suitable matching circuit, to the VTAP50 and VTAP100.
Dot Origin can provide support for integrating external off-the-shelf or custom NFC antennas with VTAP50 and VTAP100 readers. This page includes matching circuit examples for a number of off‑the‑shelf NFC antennas (
Scenarios where an external antenna may be required include:
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A VTAP reader will be embedded inside other equipment, beyond standard antenna range, for instance within a turnstile;
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Design preference for a custom antenna, for example an antenna that loops around a kiosk or vending machine touchscreen.
Note: The VTAP50‑OEM module has been EMC tested with its integrated loop antenna, printed on the PCB. The VTAP50‑OEM module is designed so that you can carefully break the integrated antenna from the board and connect an external antenna. If any external antenna is attached to the VTAP50, that new arrangement will require a corresponding tuning circuits and EMC approvals. Contact vtap‑support@dotorigin.com for details about tuning circuit and EMC approvals for the tested external antennas.
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