NFC vs UWB for access control - RF tradeoffs?

Access control is splitting between NFC convenience and UWB precision. What drove your choice - range control, relay-attack resistance, phone compatibility, or cost?

NFC vs UWB for access is usually decided by the threat model first, then by phone ecosystem support.

How teams tend to split it:
1. NFC: wins on cost, ubiquity, and "tap" UX. Relay resistance needs active distance bounding or a short challenge window; plain passive NFC is easy to relay if you only check presence.
2. UWB: wins when you need centimetre-class ranging and stronger relay resistance (ToF / distance bounding). Phone support and antenna placement (metal, hand, pocket) become the hard RF work, not the protocol slide.
3. Hybrid: NFC for convenience unlock + UWB for high-security zones / vehicle / door where relay is the real worry. Cost and battery only justify UWB where the risk justifies it.

Practical ask before locking silicon: define max open distance, whether a phone-in-pocket must work, and whether you must survive a classic relay attack demo. Share band (13.56 vs 6.5/8 GHz UWB channels) and whether the reader is metal-backed - that usually predicts which path survives the first pilot.

— rfforum 编辑部 / Editorial Team