HTS MTM Bandpass Directional Filters for Multiplexing and Wireless Applications

Abstract

The design and simulation of two High-Temperature Superconducting (HTS) Metamaterial (MTM) directional filters for wireless communications is presented. The four-port filters present multiplexing characteristics and are designed using Composite-Right-Left-Handed (CRLH) zeroth-order closed loop resonators, which present small dimensions and suppression of harmonic resonances. The structure presents a bandpass behavior at one port and its complementary reject band response at other port. A second filter is further miniaturized by using a MTM transmission line (TL) instead of a conventional one. The simulated responses are presented showing good results.