Abstract: In this letter, we introduce a novel passive transmission line of negative refractive index (i.e., left-handedness) based on identical symmetrical lattice type structures [thus called “lattice type transmission line” (LT-TL)]. The dispersion characteristic and the transmission response of the proposed LT-TL are analyzed. While all the other left-handed passive transmission lines are of high pass, the present passive left-handed transmission line is of low pass. Compared with a conventional transmission line, the LT-TL has a phase shift of 180( in the entire wide pass-band.

Key words: Negative refractive index (NRI), Transmission line (TL), Symmetrical lattice, Low pass

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