New low profile cavity-backed Hilbert slot antenna

✍ Scribed by Guido Biffi Gentili; Mariano Linari; Vasco Tesi; Andrea Vallecchi

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 289 KB
• Volume: 48
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.21995

✦ Synopsis

Abstract

In this paper, the use of a cavity‐backed Hilbert surface as an efficient slot‐like narrowband radiating aperture is suggested, to exploit its own unique electromagnetic characteristics in the context of radio frequency identification (RFID) applications. The proposed meta‐slot antenna (MSA) consists of a Hilbert surface window (HSW) made of a cascade of space‐filling slot inclusions of order three and backed by a very shallow cavity that contributes to its surface impedance and radiation characteristics. A straight longitudinal microstrip line printed on a thin, low permittivity substrate, whose ground plane includes the HSW, feeds the aperture through distributed electromagnetic coupling. As illustrated by simulation results and measurements, the antenna behaves as a magnetic current sheet over a ground plane, with a highly frequency‐selective impedance response and unidirectional radiation pattern. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 2577–2581, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21995