Permittivity and Permeability Measurements of CISR sheets for Microwave Absorber Applications

2018 IEEE International RF and Microwave Conference (RFM) Pub Date : 2018-12-01 DOI:10.1109/RFM.2018.8846539

Rahul Vashisth, Deepak K. Ghodgaonkar, Sanjeev Gupta

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引用次数: 2

Abstract

Complex permittivity (εr) and complex permeability (μr) of Carbonyl Iron filled Silicon Rubber (CISR) sheets are calculated from measured S11 and S21 by reflection and transmission method for microwave absorber applications. Rectangular Dielectric Waveguide (RDWG) system operating in frequency range of 4 to 8 GHz is used for measurement of S11 and S21. RDWG system is non-destructive in nature. For S11 and S21 measurements, TRL (Through, Reflect, Line) calibration method and time domain gating in VNA are used to calibrate and remove all measurement errors associated with the RDWG system due to multiple reflections. Five CISR sheets are fabricated with 0%, 19%, 24%, 33% and 43% of Carbonyl Iron (CI) powder by volume. For design multilayered microwave absorbers, εr and μr values are required for arbitrary volume fraction of CI in CISR sheets. In this paper, εr and μr are obtained by using exponential dielectric mixture theory or by using linear interpolation techniques.

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微波吸收用CISR片的介电常数和磁导率测量

用反射透射法计算了羰基铁填充硅橡胶(CISR)片的复介电常数(εr)和复磁导率(μr)。矩形介质波导(RDWG)系统工作频率范围为4 ~ 8ghz，用于S11和S21的测量。RDWG系统本质上是非破坏性的。对于S11和S21测量，使用TRL (Through, Reflect, Line)校准方法和VNA中的时域门控来校准和消除RDWG系统由于多次反射而产生的所有测量误差。分别以0%、19%、24%、33%和43%的羰基铁(CI)粉(按体积计)制备了5种CISR片材。在设计多层微波吸收器时，对于CISR片材中CI的任意体积分数，需要εr和μr值。本文用指数介电混合理论或线性插值技术求得εr和μr。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2018 IEEE International RF and Microwave Conference (RFM)

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