Performance enhancement of salisbury screen microwave absorber using dual-layer frequency selective surfaces (FSS)

This project presents design of Salisbury screen absorber using dual layers of frequency selective surface FSS. By using this design, the Salisbury screen able to provide dual absorbtion bands and this can improve the overall operating bandwidth. The performance improvement is obtained when fr...

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书目详细资料
主要作者: Mohamed, Saleh Omar
格式: Thesis
语言:English
English
English
出版: 2013
主题:
在线阅读:http://eprints.uthm.edu.my/2120/1/24p%20SALEH%20OMAR%20MOHAMED.pdf
http://eprints.uthm.edu.my/2120/2/SALEH%20OMAR%20MOHAMED%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/2120/3/SALEH%20OMAR%20MOHAMED%20WATERMARK.pdf
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实物特征
总结:This project presents design of Salisbury screen absorber using dual layers of frequency selective surface FSS. By using this design, the Salisbury screen able to provide dual absorbtion bands and this can improve the overall operating bandwidth. The performance improvement is obtained when frequency selective surfaces (FSS) is sandwiched between the outermost 377 V/square resistive sheet and the ground plane. In this project the dimension of the cross dipole FSS has been optimized using different length at different layers of FSS. Each FSS is positioned a quarter wavelength separation from the resistive sheet to provide impedance matching at 377ohm and therefore generating several absorption bands. The simulated result by CST Microwave Studio shows by using this strategy, three distinct absorption bands with bandwidth of 36%, 12 and 16 % centered at 6.6, 9.2 and 13 GHz respectively, this is relatively larger relatively compare to a classical Salisbury screen having the same thickness. The simulated results have been verified in measurement where the FSSs were fabricated on FR4 board over frequency range of 8 to 12 GHz. The results obtained have revealed that there are good agreements between the simulation and measurement results.