基于微波的物质检测系统设计

Material Detect System Design Based on Microwave

根据物质的介质损耗特性和微波的穿透特性,通过检测微波照射物质后能量的变化,可以实现对物质存在和类型的无损检测。利用网络分析仪和背腔螺旋天线搭建了测试系统,在较宽频带范围内,对多种物质进行测试。测试结果表明,在自由空间内,能够利用微波完成物质类型的无损检测,具有实用价值。

Due to the dielectric loss property of material and the penetration property of microwave, it 's easy to judge the existence and variety of material through detecting the change of microwave energy. Build a test system used network analyzer and back-cavityhelical antenna, and test various materials in a broad band. The test result indicates that it 's possible to realize the non-destructive testing of material in free space, and the system can be exploited to our benefit.