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New transmission lines of negative refractive index based on periodically loaded negative-impedance-converted inductors and capacitors

Published online by Cambridge University Press:  19 June 2008

X. Hu  and
S. He
X. Hu
Affiliation:
Division of Electromagnetic Theory, School of Electrical Engineering, Royal Institute of Technology, 100 44 Stockholm, Sweden Centre for Optical and Electromagnetic Research, Zhejiang University, Hangzhou 310058, P.R. China
S. He*
Affiliation:
Division of Electromagnetic Theory, School of Electrical Engineering, Royal Institute of Technology, 100 44 Stockholm, Sweden Centre for Optical and Electromagnetic Research, Zhejiang University, Hangzhou 310058, P.R. China
*
sailing@kth.se
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Abstract

A new class of negative refractive index (NRI) transmission line is proposed. Differential operational amplifiers are used to form the required lumped elements, i.e., negative-impedance-converted (NIC) inductors and capacitors. When the gain of the differential operational amplifiers in the NIC circuits is very large over the entire frequency band, the equivalent material parameters are non-dispersive, and the phase response of the new NRI transmission line can be complimentary to that of a conventional transmission line over the entire frequency band. As an application example, a broadband 1:4 power divider based on the proposed NRI transmission line is studied.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 46 , Issue 3: Metamaterials , June 2009 , 32609
Copyright
© EDP Sciences, 2009

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