Enhanced Bandwidth and Diversity in Real-Time Analog Signal Processing (R-ASP) using Nonuniform C-section Phasers

TL;DR

This paper introduces a nonuniform C-section phaser that significantly improves bandwidth and diversity in real-time analog signal processing by suppressing spurious harmonics and leveraging continuous profile flexibility.

Contribution

It presents a novel nonuniform coupled line C-section phaser design that enhances bandwidth and diversity, supported by theoretical analysis and experimental validation.

Findings

Bandwidth is increased due to suppression of spurious harmonics

Diversity is improved through continuous profile design

Experimental results confirm theoretical predictions

Abstract

We show that a continuously nonuniform coupled line C-section phaser, as the limiting case of the step discontinuous coupled-line multisection commensurate and non-commensurate phasers, provides enhanced bandwidth and diversity in real-time analog signal processing (R-ASP). The phenomenology of the component is explained in comparison with the step-discontinuous using multiple-reflection theory and a simple synthesis procedure is provided. The bandwidth enhancement results from the suppression of spurious group delay harmonics or quasi-harmonics, while the diversity enhancement results from the greater level of freedom provided by the continuous nature of the nonuniform profile of the phaser. These statements are supported by theoretical and experimental results.