Abstract
AbstractThe high‐impedance property of an offset finite‐ground microstrip line is utilized to construct an improved transmission‐line electromagnetic bandgap (EBG) structure with enhanced bandgap width and attenuation. Using the self‐calibrated method of moments (MoM), the two effective per‐unit‐length parameters are firstly extracted to demonstrate the fundamental frequency‐dispersive characteristics of the guided wave in this EBG. Then, the transmission coefficients of the two finite‐length EBG circuits with ideal impedance matching at two ports are characterized, thus exhibiting the distinctive bandstop and bandpass behaviors as the guided‐wave propagates across this EBG with finite‐extended region. Finally, a five‐cell EBG circuit, fed with the standard 50Ω feed lines, is further modeled to give an evident verification of its enhanced EBG performance. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 47: 543–546, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21225
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