A 45-Degree Grooved High-Reliability Ceramic Coaxial Vacuum Insulator for High-Power Microwave Generation
Authors:
- Liang ZhaoLZLiang Zhao
- Zhiqiang GuoZGZhiqiang Guo
- Jie ChengJCJie Cheng
- 26 May 2026
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Dielectrics and Electrical Insulation
- Vol. PP (10709878) , 1
Abstract
A ceramic coaxial vacuum insulator has been designed and fabricated to deliver 600-kV nanosecond pulses for high-power microwave (HPM) generation. Compared to previously reported ceramic vacuum insulators in the literature, this design incorporates two distinctive features: a 45° conical angle, a grooved surface, and high reliability. The 45° conical angle is used to maximize the vacuum surface flashover threshold. The grooved surface, featuring rectangular grooves with a width of 4 mm, depth of 5 mm, and pitch of 8 mm, is engineered to further enhance the insulation performance. Theoretical calculations estimate the overall reliability of the insulator structure to exceed 90%. Preliminary experimental tests confirm that the ceramic coaxial vacuum insulator operates reliably, with no observable signs of failure.Keywords
Funding Information
- National Natural Science Foundation of China (12175182)