摘要
一般微扰法在测量粉末状材料介电常数时,需要破坏样品将材料制成杆状或圆柱状等标准形状,同时只能在单点频率下测量,具有很大的局限性。针对上述问题,提出了一种改进的测量方法——多模谐振微扰法。该方法是在微扰法基础上的改进,适合宽频无损测量粉末状材料的介电常数。对多模谐振微扰法的测量原理、系统和方法进行了较为详细的描述,通过仿真和实验得到了相应的结果并进行了误差分析,验证了该方法的合理性和有效性。
Generally when measuring the complex permittivity of powdered material by perturbation method,it is necessary to destruct the sample material to make it into standard shapes such as rod- shape or cylinder. Moreover by this way,it can only be measured at a single point frequency with significant limitations. Aiming at these problems,we propose an improved measuring method-the multi- mode resonant perturbation method. This method is improved on the basis of perturbation method,but suitable for non- destructive and broadband measurement of powdered material's complex permittivity. In this article,we make a detailed description of the measurement principle,system and method. Finally through simulation and experiment we analyze the relative error and verify the reasonableness and effectiveness of the improved method.
出处
《微波学报》
CSCD
北大核心
2015年第3期83-85,共3页
Journal of Microwaves
关键词
微扰法
复介电常数
多模谐振
无损测量
粉状材料
perturbation method,complex permittivity,multimode resonance,nondestructive measurement,powdered material
