摘要
介绍了同轴电缆头和转接头的HPM击穿实验研究方法,给出了几种电缆头和转接头微波击穿功率随微波频率、脉冲宽度、重复频率和脉冲持续时间变化规律的实验研究结果。结果表明:微波击穿发生在同轴电缆头连接处,是电缆接头沿面滑闪,且击穿功率随同轴电缆及转接头尺寸的减小而降低;击穿功率也随微波脉冲宽度(30 ns^1μs)的增大而减小,并且在100 ns附近有一拐点;在低重复频率(1~1000 Hz)下,重频对击穿功率的影响不大;微波频率在2.856~9.37 GHz变化时,微波频率对击穿功率的影响不明显;微波脉冲宽度较窄时(几十ns以下),击穿功率随持续时间变化不大,脉冲宽度较宽时(百 ns以上),击穿阈值随持续时间的增大而下降。
The experimental method of HPM breakdown of coaxial-cable and connector is introduced. It is given by experimentally that the microwave breakdown thresholds of several kinds of coaxial-cables and connectors vary with microwave frequency, pulse width, repetitive frequency and burst duration. Breakdown power threshold increases as pulse width (30 ns - 1 μs) decreases, and an inflexion appear at about 100 ns. In low repetitive frequency region, i.e., from single pulse to 1 kHz, the repetitive rate of microwave pulse literally has no effect on breakdown power. Microwave frequency tuned from 2.856 GHz to 9.37 GHz, no significant change of breakdown power level is observed. When the pulse width becomes as narrow as tens of nanoseconds, the breakdown power varies little even though the burst duration is adjusted in relatively large scale. However, as long as the microwave pulse width is widened to over one hundred nanoseconds, breakdown threshold falls down continuously and dramatically.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2005年第2期233-236,共4页
High Power Laser and Particle Beams
基金
国家863计划项目资助课题
关键词
微波击穿
同轴电缆
转接头
高功率微波
Electric breakdown
Electric connectors
Electromagnetic waves
Microwaves
