NDLI: Electromagnetic and absorption properties of carbonyl iron/rubber radar absorbing materials

Content Provider	IEEE Xplore Digital Library
Author	Yong-Bao Feng Tai Qiu Chun-Ying Shen Xiao-Yun Li
Copyright Year	1965
Abstract	We measured the effective complex magnetic permeability /spl mu//sub eff//sup / and dielectric permittivity /spl epsiv//sub eff//sup / spectra in rubber radar absorbing material (RAM) with various carbonyl iron volume fractions by using the transmission/reflection method with a vector network analyzer. We studied the effects of carbonyl iron content and rubber thickness on the microwave absorption properties in the frequency range of 2.6 to 18 GHz. Our mathematical analysis is based on electromagnetic theory. The results indicate that the effective complex magnetic permeability and dielectric permittivity values of the RAM increase as the carbonyl iron volume fraction increases. For sample thickness of 3.0 mm, an increase in carbonyl iron content reduces the minimum reflection loss from -1.3 to -23.9 dB and shifts the frequency of the minimum reflection loss from 15.5 to 3.5 GHz. For an equal volume fraction of carbonyl iron, the frequency of the minimum reflection loss decreases as the thickness is increased. However, the dip in the reflection loss plot (in decibels) initially decreases to a minimum value before it increases with a further increase in thickness. We determined the value of the reflection loss for the samples by the impedance matching degree (reflection coefficient), which depends on the thickness and composition of the RAM.
Sponsorship	IEEE Magnetics Society
Starting Page	363
Ending Page	368
Page Count	6
File Size	274546
File Format	PDF
ISSN	00189464
Volume Number	42
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electromagnetic wave absorption Iron Rubber Radar Organic materials Reflection Magnetic materials Frequency Dielectric materials Permeability reflection loss Carbonyl iron permeability permittivity radar absorbing material (RAM)
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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