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Design of graded honeycomb radar absorbing structure with wide-band and wide-angle properties

Published online by Cambridge University Press:  05 November 2018

Yuchen Zhao
Affiliation:
Xi'an University of Technology, Xi'an 710048, China
Fang Ren
Affiliation:
Xi'an University of Technology, Xi'an 710048, China
Li He
Affiliation:
Xi'an University of Technology, Xi'an 710048, China
Jinsheng Zhang
Affiliation:
Xi'an University of Technology, Xi'an 710048, China Xi'an High-tech Institute, Xi'an 710025, China
Yanning Yuan
Affiliation:
Xi'an University of Technology, Xi'an 710048, China
Xiaoli Xi
Affiliation:
Xi'an University of Technology, Xi'an 710048, China
Corresponding
E-mail address:

Abstract

In this paper, the design of a graded honeycomb radar absorbing structure (RAS) is presented to realize both a wide bandwidth and absorption over a wide range of angles. For both transverse-electric and transverse-magnetic polarization, a fractional bandwidth of more than 118.6% is achieved for at least a 10 dB reflectivity reduction when the incident angle is <45°, an 8 dB reduction when the incident angle is <55° and a 5 dB reduction when the incident angle is <70°. Meanwhile the 10 dB reduction upper angle limit is approximately 30° for the uniform coating honeycomb RAS in the literature, which loses its absorbing ability when the incident angle is larger than 55°. Furthermore, the total thickness of our design is 10.7 mm, which is only approximately 1.29 times that of the theoretical limitation. The good agreement between the calculated, simulated, and measured results demonstrates the validity of this optimization.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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