Wider frequency domain for negative refraction index in a quantized composite right-left handed transmission line

TL;DR

This paper demonstrates that the negative refraction index in a quantized CRLH transmission line can be achieved over a wider frequency range by circuit component adjustments and dissipative factors, aiding compact circuit design.

Contribution

It introduces a method to realize a broader negative refraction index bandwidth in quantized CRLH-TL using circuit parameters and dissipation effects.

Findings

Negative refraction index achievable from 1.446GHz to 15GHz

Adjustable negative refraction via circuit components at 0.995GHz

Dissipative factors influence the negative refraction properties

Abstract

The refraction index of the quantized lossy composite right-left handed transmission line (CRLH-TL) is deduced in the thermal coherence state. The results show that the negative refraction index (herein the left-handedness) can be implemented by the electric circuit dissipative factors(i.e., the resistances \(R\) and conductances \( G\)) in a higher frequency band (1.446GHz\(\leq\omega\leq \) 15GHz), and flexibly adjusted by the left-handed circuit components (\(C_l\), \(L_l\)) and the right-handed circuit components (\(C_r\), \(L_r\)) at a lower frequency (\(\omega\)=0.995GHz) . The flexible adjustment for left-handedness in a wider bandwidth will be significant for the microscale circuit design of the CRLH-TL and may make the theoretical preparation for its compact applications.