Development of a Low Radar Cross Section Antenna With Band-Notched Absorber

A low radar cross section (RCS) antenna designed with band-notched absorber is described. First, a dual-polarization absorber with relative bandwidth more than 80% is designed using loaded resistors. Pairs of circular slot resonators and metal strip array resonators are introduced in the absorber to...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation Vol. 66; no. 2; pp. 582 - 589
Main Authors: Mei, Peng, Lin, Xian Qi, Yu, Jia Wei, Boukarkar, Abdelheq, Zhang, Peng Cheng, Yang, Zi Qiang
Format: Journal Article
Language:English
Published: New York IEEE 01.02.2018
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Absorbers
Absorption
Absorption spectra
Antenna radiation patterns
Band-notched absorber
Dipole antennas
Dipoles
Dual polarization radar
Horizontal polarization
low radar cross section (RCS) antenna
Metals
notch band
Radar antennas
Radar cross sections
RCS reduction
Reflectance
Reflection
Reflection coefficient
Resistors
Resonators
Vertical polarization
ISSN:0018-926X, 1558-2221
Online Access:Get full text
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Summary:A low radar cross section (RCS) antenna designed with band-notched absorber is described. First, a dual-polarization absorber with relative bandwidth more than 80% is designed using loaded resistors. Pairs of circular slot resonators and metal strip array resonators are introduced in the absorber to realize a notch band with full reflectance in the vertical polarization, while a wide absorption band in the horizontal polarization is maintained. The proposed band-notched absorber is thus realized. Within the notch band, the absorber can be served as a metal ground for antenna; while a great RCS reduction is obtained out of the notch band and in the horizontal polarization band. Then, a dipole antenna rigorously designed is mounted above the band-notched absorber, whose operating frequency is exactly in accordance with that of the notch band. The proposed low RCS antenna is established based on assembling the dipole antenna and the band-notched absorber together. The measured results demonstrate that the proposed antenna has fairly good radiation patterns. Added to that, more than 10 dB RCS reduction in two polarizations is realized simultaneously compared with that one of a conventional dipole antenna.
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ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2017.2780903