Building Left-Handed Transmission Lines Using High-Temperature Superconductors

摘要

This work explores the building of superconducting left-handed transmission lines (LH-TL) for microwave applications. Low-loss, via-free and miniature LH-TLs are demonstrated on HTS thin film devices. LH-TLs with asymmetrically arranged shunt inductors are discussed. The effects of using bonding-wires to balance the coplanar ground planes are observed. A second configuration of LH-TL with a further miniaturised structure is designed and measured. It shows the capability of enhancing the left-handed bandwidth.