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A double-Lorentz (DL) transmission line (TL) metamaterial is proposed for the first time. Both effective material parameters ?eff and ?eff of the corresponding line exhibit a Lorentz-type dispersion, hence the proposed terminology double-Lorentz. This type of TL presents the interest of being intrinsically tri-band, while the previously reported composite right/left-handed TL metamaterial is only...
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