Bandwidth enhancement in compact dual open‐loop antenna for UHF near‐field RFID reader. Issue 9 (September 2015)

• Record Type: Journal Article
• Authors: Chen, Hua‐Ming; Lin, Yi‐Fang; Chen, Chien‐Hung; Hsu, Jui‐Chan
• Is Part Of: Microwave and optical technology letters. Volume 57:Issue 9(2015:Sep.)
• Page Start: 2008
• Page End: 2012
• Publication Date: 2015-09
• Subjects: Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.29254
• Languages: English
• ISSNs: 0895-2477

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>A compact dual open‐loop antenna is proposed to provide enhanced bandwidth in near‐field applications in the ultra‐high frequency band. The antenna generates a strong and uniform magnetic field in a near‐field zone of the smaller open‐loop antenna. For increased bandwidth, two open loops with individual half‐wavelength perimeters are etched on each side of an FR4 printed circuit board. The antenna was fabricated in a compact overall size (dimensions, 60 × 60 × 0.8 mm³) and achieves an interrogation zone of 50 × 50 mm² with good impedance matching and uniform magnetic field distribution in a 888–932 MHz band. Performance tests indicate that the proposed antenna has a reading distance of up to 130 mm for near‐field applications and is suitable for radio frequency identification reader applications. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2008–2012, 2015</p> </abstract>