電磁脈衝防護元件與電路設計

• Main Authors: YU-WEY-PING, 余尉平
• Other Authors: 張連璧
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/44007915368680109553

碩士 === 國防大學中正理工學院 === 電子工程研究所 === 91 === The electro-magnetic pulse（EMP）assault has the most opportunity to be used in modern wars. Because this assault has the advantages of destroying equipments only, confining in specific local area, and costing little… etc. Thus every country develops its own EMP protective technology to increase their survival rate while they are subjected by the EMP assault. The first issue of this thesis is to design a protective circuit used in the wireless front-end and meet the related specification. And a designed circuit which can suppress the transient voltage surge from 5 KV to 24 V is obtained. The second issue of this thesis is to improve the surge suppressing ability of ZnO-based metal oxide varistor （MOV）by blending the ZnO nano-powder. From the experimental results, we find that it can increase MOV's breakdown voltage, surge current, and nonlinear coefficient. In the meantime it can decrease the leakage current also. The final issue of this thesis is to fabricate an electrostatic discharge (ESD) device as a final stage for the purpose of EMP protection circuit which having low voltage trigger silicon control rectifier (LVTSCR) structure. From our primary results, we found that this LVTSCR can achieve a bi-directional breakdown clamping operation with a clamping voltage lower than 10 V.