Analytical evaluation of defect generation for selective laser melting of metals
Conference proceedings article
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Publication Details
Author list: Promoppatum P., Yao S.-C.
Publisher: Hindawi
Publication year: 2019
Volume number: 103
Issue number: #
Start page: 1185
End page: 1198
Number of pages: 14
ISBN: 9781538682692
ISSN: 0146-9428
eISSN: 1745-4557
Languages: English-Great Britain (EN-GB)
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Abstract
Radar absorbing material is an indispensable part of a stealth aircraft. It renders the aircraft invisible to radar detection. This paper proposes a wideband dual-substrate frequency selective surface based on quadruple hexagonal split rings as a radar absorber. Such split rings on Rogers RT-5880 constitutes a passband characteristic while ECCOSORB SF with copper patch acts to reduce the transmission. The 90% absorption bandwidths are 5.15 and 4.70 GHz in the X-band for TE TM modes, respectively, at normal incidence. The absorption remains as high as 90% for an incident angle of upto 45ฐ, beyond which the absorption drops slightly to about 80% while the bandwidth is slightly reduced. ฉ 2019 IEEE.
Keywords
bandpass filter, Frequency selective surface, radar absorber, radar absorbing material, radome, stealth technology, wideband absorption, X-band
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