Compensating Atmospheric Channel Dispersion for Terahertz Wireless Communication

TL;DR

This paper introduces a novel method to compensate atmospheric dispersion in terahertz wireless communication, significantly improving data transmission rates by correcting pulse distortion caused by air's frequency-dependent refractivity.

Contribution

The paper presents the first practical method using stratified media reflectors to effectively compensate atmospheric group velocity dispersion in terahertz channels.

Findings

Achieved over 98% in-band power efficiency.

Compensated up to 99% of dispersion in simulations.

Validated method through experimental measurements.

Abstract

We report and demonstrate for the first time a method to compensate atmospheric group velocity dispersion of terahertz pulses. In ultra-wideband or impulse radio terahertz wireless communication, the atmosphere reshapes terahertz pulses via group velocity dispersion, a result of the frequency-dependent refractivity of air. Without correction, this can significantly degrade the achievable data transmission rate. We present a method for compensating the atmospheric dispersion of terahertz pulses using a cohort of stratified media reflectors. Using this method, we compensated group velocity dispersion in the 0.2-0.3 THz channel under common atmospheric conditions. Based on analytic and numerical simulations, the method can exhibit an in-band power efficiency of greater than 98% and dispersion compensation up to 99% of ideal. Simulations were validated by experimental measurements.