Single-Step Tunable Group Delay Phaser for Real-Time Spectrum Sniffing

TL;DR

This paper introduces a single-step tunable group delay phaser that acts as a time filter for spectrum sniffing, offering higher resolution, lower loss, and improved channel equalization over traditional multi-step devices.

Contribution

The paper proposes a novel single-step tunable group delay phaser that enhances spectrum sniffing capabilities with improved performance metrics.

Findings

Higher processing resolution compared to multi-step phasers

Lower loss and better channel equalization

Smaller, channel-independent group delay swing

Abstract

This paper presents a single-step tunable group delay phaser for spectrum sniffing. This device may be seen as a "time filter", where frequencies are suppressed by time separation rather than by spectral attenuation. Compared to its multiple-step counterpart, this phaser features higher processing resolution, greater simplicity, lower loss and better channel equalization, due to the smaller and channel-independent group delay swing. A three-channel example is provided for illustration.