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小小毛毛虫-

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[求助] 用Agilent4294A测介电损耗遇到的小问题???? 已有1人参与

本人用安捷伦4294A测玻璃的介电损耗时,取点801,在801个数据点当中出现的基本上是负值,介电损耗有负值吗,为什么会产生负值,第一次遇到,不解???

用Agilent4294A测介电损耗遇到的小问题????
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用Agilent4294A测介电损耗遇到的小问题????-1
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强与弱其实是一种精神的较量!
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chinaworm

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stfmx: 金币+2, 专家考核, 感谢专家 2014-04-21 11:38:45
The main challenge in dielectric measurements is producing good contacts where good means ohmic. That is absolutely essential and an art. It might be possible that your contacts are not ohmic. It very often happens that people get contacts with some rectification properties. That is a killer for those measurements. The problem is that you will always get some results from your analyzer and start interpreting sample physics which in fact might be dominated by contact physics. This may serve as a start. I am not an expert in giving advice how to prepare the contacts.

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2楼2014-04-21 10:06:22
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小小毛毛虫-

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2楼: Originally posted by chinaworm at 2014-04-21 10:06:22
The main challenge in dielectric measurements is producing good contacts where good means ohmic. That is absolutely essential and an art. It might be possible that your contacts are not ohmic. It ver ...

thank u
强与弱其实是一种精神的较量!
3楼2014-04-23 15:34:22
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jzk19940220

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3楼: Originally posted by 小小毛毛虫- at 2014-04-23 15:34:22
thank u...

您好,我昨天测了一个中间是空心的结构,材料是PC的,测出来的介电损耗值都是负数,逐渐向0靠拢..您知道这是什么原因么?
4楼2016-12-03 15:07:52
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