# Backward wave oscillator with resonator made of metal foils (photonic BWO)

## TL;DR

This paper presents a numerical and experimental study of a photonic backward wave oscillator that uses a foil photonic crystal to generate high power microwaves at a single frequency below cutoff modes.

## Contribution

It introduces a novel photonic BWO design utilizing foil photonic crystals and demonstrates single frequency operation through analysis and experiments.

## Key findings

- Successful numerical and experimental validation of microwave generation
- Single frequency operation below cutoff modes achieved
- Photonic crystal structure enhances BWO performance

## Abstract

Numerical and experimental analysis of high power microwave generation in photonic BWO, which uses foil photonic crystal, is presented. Single frequency excitation of the below cutoff modes in the photonic BWO is analyzed and demonstrated.