| A Square Coaxial Transmission Line with a Thin-Wire Inner Conductor to Measure the Absorbing Performance of Electromagnetic Absorbers |
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Tae-Weon Kang1, Paul John2, Paul John |
1Electromagnetics Group, Korea Research Institute of Standards and Science
2Electromagnetics Research Group, School of Electrical and Electronic Eng.,University of Nottingham |
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| Abstract |
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A low-frequency coaxial reflectometer(LCR) with a thin-wire inner conductor is designed and constructed to measure nondestructively the absorbing performance of electromagnetic absorbers in the frequency range of 10 MHz to 200 MHz. The LCR consists of a square coaxial transmission line and a network analyzer with a time-domain measurement capability. Inherent characteristics of a square coaxial line with a thin-wire inner conductor which deteriorate the impedance matching of the input port of the LCR are addressed. And the characteristics are improved by employing a multiwire inner conductor. Measured and calculated reflection losses of a flat ferrite tile absorber are presented. |
| Key words:
Low-Frequency Coaxial Reflectometer(LCR), Electromagnetic Absorber, Absorbing Performance, Reflection Loss |
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