Summary
2019 Joint International Symposium on Electromagnetic Compatibility and Asia-Pacific International Symposium on Electromagnetic Compatibility, Sapporo
2019
Session Number:WedPM2Po
Session:
Number:WedPM2Po.12
Multipactor Simulation and Suppression in High-Power Ferrite Circulators
Yun Li, Hongguang Wang, Jing Yang, Wanzhao Cui,
pp.-
Publication Date:2016/10/5
Online ISSN:2188-5079
DOI:10.34385/proc.58.WedPM2Po.12
Summary:
High-power multipactor effect always leads to high risk of passive intermodulation and electromagnetic compatibility problems. In this paper, multipactor in ferrite circulators has been simulated, analyzed, and measured. Using the Electromagnetic Particle-In-Cell method, the discharge breakdown thresholds of multipactor in circulators with electron-blocking dielectric and without electron-blocking dielectric have been predicted and verified by simulations. To improve the simulation accuracy of electron emission and collision on the ferrite dielectric, Secondary Electron Emission properties have been measured and fitted into the numerical models. Through power scanning method, transient evolution of electron numbers has been obtained and threshold predicted. Simulation results show that the threshold power of these circulators with and without electron-blocking were 1000W and 9700W, respectively. It demonstrates that multipactor breakdown power in ferrite circulators have been improved more than 900% utilizing the electron-blocking dielectric, which is promising for high-power applications, especially in space industry.