1. Wideband absorber at X-band adopting trumpet-shaped structures.
- Author
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Beom-Kyu Kim and Bomson Lee
- Subjects
- *
BROADBAND communication systems , *RESONATORS , *ELECTRIC resistors , *ABSORPTION , *BANDWIDTHS - 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 x 5.6 x 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. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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