SARAVANAKUMAR VEERAPPAN. A Comparative Study of NFC and UWB Technologies for Secure Contactless Payment Systems. National Journal of RF Circuits and Wireless Systems , [S. l.], v. 1, n. 1, p. 49–57, 2024. DOI: 10.17051/NJRFCS/01.01.06. Disponível em: https://ecejournals.in/index.php/RFMW/article/view/230.. Acesso em: 23 jan. 2026.