Media type: E-Article Title: Critical coupling of a planar inverted F‐antenna using a ferrite sheet Contributor: Kim, Hojeong; Choi, Hyengcheul; Jeon, Sinhyung; Kim, Hyeongdong imprint: Wiley, 2010 Published in: Microwave and Optical Technology Letters Language: English DOI: 10.1002/mop.24950 ISSN: 1098-2760; 0895-2477 Keywords: Electrical and Electronic Engineering ; Condensed Matter Physics ; Atomic and Molecular Physics, and Optics ; Electronic, Optical and Magnetic Materials Origination: Footnote: Description: <jats:title>Abstract</jats:title><jats:p>In this letter, a novel method that can achieve critical coupling in a planar inverted F‐antenna of high height is proposed. Theproposed antenna can achieve critical coupling by attachment of a ferrite sheet without changing the size of the antenna or ground plane. A ferrite sheet is used to increase shunt inductance of the shorting pin loop. The proposed antenna is modeled by an equivalent circuit based on transmission line modeling. It has a very wide bandwidth of 16% for a voltage standing wave ratios <2. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 400–403, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24950</jats:p>