Experimental Demonstration of a New Oscillator Concept Based on Degenerate Band Edge in Microstrip Circuit

TL;DR

This paper presents the first experimental demonstration of an oscillator utilizing a microstrip circuit with a degenerate band edge, enabling stable, single-mode oscillation with load resistance stability.

Contribution

It introduces a novel oscillator concept based on the degenerate band edge in microstrip circuits, demonstrating experimental feasibility.

Findings

Successful experimental demonstration of DBE-based oscillator

Stable single-mode oscillation achieved

Oscillator stability with load resistance variations

Abstract

The first experimental demonstration of an oscillator based on a periodic, resonant microstrip circuit with a degenerate band edge (DBE) is presented. The DBE is a fourth-order exceptional degeneracy of the eigenmodes in a lossless periodic waveguide that is visible in the wavenumber-frequency dispersion diagram, and the periodic microstrip behaves as a frequency selective medium. The presence of the DBE condition and the associated DBE resonance allow for a stable, single-mode oscillation as well as stability with varying the load resistance.