Reduced antenna size is a common compromise in miniature electronic systems with typical implementations at a fraction of those available in contactless cards and smartphones. The resulting reduction in wireless performance can lead to poor user experience in attempting contactless payment from a wearable device.
AS3921 is said to overcome this, boasting a 900% increase in NFC reader operating volume, two thirds decrease in circuit footprint, 80% reduction from typical NFC controllers, a 100mm2 antenna size compared to 2150mm2 for contactless card and the AS3921 complies ISO/IEC 14443 (types A and B) and FeliCa RFID protocols.
These industry-leading numbers are claimed to bring more reliable connection to payment terminals and ticket barriers, faster perceived transactions and greater convenience of use.
