A novel miniature monopole tag antenna for passive UHF RFID applications

✍ Scribed by Hsien-Wen Liu; Chia-Hao Ku; Chang-Fa Yang; Te-Shun Wang

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 596 KB
• Volume: 52
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.25596

✦ Synopsis

Abstract

A novel miniature monopole tag antenna for passive Ultra‐High Frequency (UHF) radio frequency identification (RFID) operation is presented.The antenna possesses a two‐sided structure that is printed on an FR4 substrate and fed by a 50‐Ω microstrip line. By properly using helical strips and vias, the antenna size can be reduced to a small volume of 10 (L) × 9.5 (W) × 0.8 (H) mm^3^ to be easily integrated within various portable devices. A miniaturized quasi‐lumped circuit is also designed to attain a good impedance matching between the antenna and the chip. Experimental results demonstrate that the antenna has a suitable operating band about 914–939 MHz and also quite omnidirectional radiation pattern with appreciable gain. Moreover, the proposed compact tag antenna, capable of achieving a maximum readable range of about 5.6 m with an EIRP equal to 4 W, is well suited for RFID applications. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2770–2772, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25596