Conventional microwave heating techniques are limited due to inherent thermal point residency effects and inadequate control over the heating process. A novel method is proposed to enhance microwave heating uniformity using the injection-pulling technique. In this method, the injection-pulling technique is used to achieve simultaneous modulation of both the output phase and frequency of the magnetron, thereby extending the locking bandwidth of the injection-locking technique. The output characteristics of the injection-pulled magnetron were validated through numerical calculations and experiments. Microwave heating experiments were conducted under both a five-cup water load and an absorbent paper load. Compared with conventional injection-locking frequency sweeping, the proposed method not only expands the sweeping bandwidth from 8 to 18 MHz but also further improves heating uniformity, offering more options for magnetron applications in microwave heating.
Cite
@article{arxiv.2512.06482,
title = {Study on Improving Microwave Heating Uniformity Based on Phase-Frequency Simultaneous Modulation Technique},
author = {Xu Zhu and Shaoyue Wang and Da He and Liping Yan and Jianan Hu and Changjun Liu},
journal= {arXiv preprint arXiv:2512.06482},
year = {2025}
}