DocumentCode
78210
Title
Wideband absorber at X-band adopting trumpet-shaped structures
Author
Beom-Kyu Kim ; Bomson Lee
Author_Institution
Dept. of Electron. & Radio Eng., Kyung Hee Univ., Yongin, South Korea
Volume
50
Issue
25
fYear
2014
fDate
12 4 2014
Firstpage
1957
Lastpage
1959
Abstract
A wideband single-layer absorber at X-band adopting trumpet structures is presented. One unit of the proposed absorber is composed of a trumpet-shaped resonator loading four chip resistors, a metallic backplane and an FR-4 (εr = 4.4-j0.02) substrate between them. The absorption is 99% at 10.9 GHz. The full width at half maximum is 95% at 12.7 GHz (6.7-18.7 GHz). The 90% absorption bandwidth is 65% at 12.75 GHz (8.6-16.9 GHz). The size of the unit cell is 5.6 × 5.6 × 2.4 mm3. The proposed absorber is almost insensitive to polarisations of incident waves due to the symmetry of the structure. The results of EM simulation and measurements are in good agreement.
Keywords
electromagnetic wave absorption; microwave materials; microwave resonators; EM simulation; FR-4 substrate; X-band; bandwidth 12.75 GHz; chip resistors; frequency 6.7 GHz to 18.7 GHz; incident wave polarisations; metallic backplane; trumpet-shaped resonator; trumpet-shaped structures; unit cell; wideband single-layer absorber;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el.2014.2780
Filename
6975733
Link To Document