An improved technique for measuring electromagnetic properties of curved surfaces coating materials with open-ended coaxial line probe

被引：0

作者：

Hassan, A.-K.A. ^{[1
]}

Xu, D. ^{[1
]}

Niu, M. ^{[1
]}

Zhang, Y. ^{[1
]}

机构：

[1] Sch. of Communication and Info. Eng., Shanghai University, Shanghai 200072, China

来源：

| 2001年 / Chinese Institute of Electronics卷 / 10期

关键词：

Finite difference method - Magnetoelectric effects - Mathematical models - Surface testing - Time domain analysis;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

An improved open-ended coaxial probe technique for measuring electromagnetic properties of coating materials with curved surfaces (both convex and concave) is studied. FDTD modeling indicates that the reflection coefficient of the loaded probe is more sensitive to concave surface samples than to those with convex surface. In order to satisfy concave surface materials testings we proposed a technique to improve the measurement accuracy by modifying the standard coaxial probe. A ring patch is added at the end of extended inner conductor throughout the air gap between the probe and the material under test. The performance of the proposed technique is examined. The derived Ε* and μ* of several microwave absorbing materials coated on prototype boxes by using the new probe are relatively in agreement with the published data.

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