Affiliation:
1. Department of Materials Engineering, Dalian University of Technology, Dalian 116023, PR China,
2. Department of Materials Engineering, Dalian University of Technology, Dalian 116023, PR China
Abstract
Slab absorber is an important topic not only for military purposes but also for commercial application. Single-layer compact slab absorber cannot meet the required wave absorption in broad wave band besides some absorption peaks, and it is very necessary to develop a new kind of absorber to meet the need of absorption in broad wave band. In this study, a discrete slab absorber (DSA) has been developed by isolating conductive medium in absorbing matrix, and the reflection loss test indicates that the DSA exhibited excellent absorption effectiveness at 8-18 GHz. With the increasing carbon black (CB) content of the isolated conductive particles in the slab absorber, the reflection loss increases in the range 8-18 GHz. When mass fraction of CB gets to 30%, the reflection loss is below 10 dB in the range 8.5-18 GHz, and the effective absorption band below 10 dB gets to 9 GHz. In comparison, the compact slab sample with 30 mass% CB only shows two absorption peaks and the effective absorption band below 10 dB is under 1 GHz. Finally, an absorption mechanism is suggested.
Subject
Materials Chemistry,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites
Cited by
35 articles.
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