Electromagnetic response of a CRLH particle composed of a multi-layered CRLH transmission line with a floating ground

This paper proposes a multi-layered (ML) composite right/left-handed (CRLH) transmission line (TL) with a floating ground. Different from the conventional ML CRLH TLs, the proposed TL does not have any input/output ports and it works like a dielectric resonator by using an electromagnetic coupling with other circuits. Especially, since the physical parameters of the TL, a permittivity ε and a permeability μ, can be controlled by four CRLH equivalent circuit parameters such as a left-handed (LH) series capacitance C_L, a LH shunt inductance L_L and so on, materialistic design can be done for this TL. As an application example, a UWB bandpass filter having a in-band notch response was demonstrated theoretically.