Phase diffusion in high-power microwave sources

TL;DR

This paper investigates phase diffusion in high-power microwave sources, demonstrating how autocorrelation measurements can determine the phase diffusion coefficient, which is crucial for synchronizing multiple sources, exemplified by a relativistic reflex triode at 3.3 GHz.

Contribution

It introduces a method to measure phase diffusion coefficients in high-power microwave sources using autocorrelation analysis.

Findings

Phase diffusion coefficient for a relativistic reflex triode is approximately 0.06 rad^2·ns^{-1}.

Autocorrelation analysis effectively determines phase stability in high-power microwave sources.

Phase diffusion impacts synchronization capabilities of multiple microwave sources.

Abstract

Autocorrelation of electromagnetic fields emitted by high-power microwave sources makes it possible to determine the phase diffusion coefficient $D$. The value of $D$ imposes significant constraints on synchronization of several HPM sources. It is clearly demonstrated by the example of a relativistic reflex triode operating at $f\approx3.3$ GHz and having the phase diffusion coefficient equal to $D\approx0.06$ rad$^{2}\cdot$ns$^{-1}$.