Abstract
A novel fractal-shaped compact microstrip resonant cell (CMRC) featuring a strong slow-wave effect has been presented. Its vital usefulness in the process of microstrip line miniaturisation has been proved and experimentally validated on the basis of a compact 3-dB branch-line coupler illustrating the possibilities of the approach. A prototype example structure has been designed to mirror the characteristics of a conventional device, simultaneously presenting substantial size reduction. The measured results are in excellent accordance with theoretical characteristics confirming the utility of proposed novel fractal-shaped CMRC in compact circuits developed in microstrip technology. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2613–2615, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25517
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