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Fabrication and characterization of resistive double square loop arrays for ultra-wide bandwidth microwave absorption

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Abstract
Microwave absorbers using conductive ink are generally fabricated by printing an array pattern on a substrate to generate electromagnetic fields. However, screen printing processes are difficult to vary the sheet resistance values for different regions of the pattern on the same layer, because the printing process deposits materials at the same height over the entire surface of substrate. In this study, a promising manufacturing process was suggested for engraved resistive double square loop arrays with ultra-wide bandwidth microwave. The developed manufacturing process consists of a micro-end-milling, inking, and planing processes. A 144-number of double square loop array was precisely machined on a polymethyl methacrylate workpiece with the micro-end-milling process. After engraving array structures, the machined surface was completely covered with the developed conductive carbon ink with a sheet resistance of 15 Ω/sq. It was cured at room temperature. Excluding the ink that filled the machined double square loop array, overflowed ink was removed with the planing process to achieve full filled and isolated resistive array patterns. The fabricated microwave absorber showed a small radar cross-section with reflectance less than ??10 dB in the frequency band range of 8.0?14.6 GHz.
Author(s)
정지영이재령박현진정준교최두선전은채신종화한준세제태진
Issued Date
2021
Type
Article
Keyword
Electromagnetic fieldsEngineeringMaterials sciencePolymethyl methacrylatePolymethylmethacrylatePrintingScreen printing
DOI
10.1038/s41598-021-91868-y
URI
https://oak.ulsan.ac.kr/handle/2021.oak/8980
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_doaj_primary_oai_doaj_org_article_ee28a9b9084f4ee699862156407c6b75&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Fabrication%20and%20characterization%20of%20resistive%20double%20square%20loop%20arrays%20for%20ultra-wide%20bandwidth%20microwave%20absorption&offset=0&pcAvailability=true
Publisher
SCIENTIFIC REPORTS
Location
독일
Language
영어
ISSN
2045-2322
Citation Volume
11
Citation Number
1
Citation Start Page
12767
Citation End Page
12767
Appears in Collections:
Engineering > Material Engineering
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