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Dual polarised wideband metamaterial radar absorbing screen based on resistive Hilbert curve array

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2 Author(s)
Noor, A. ; Sch. of Electr. & Electron. Eng., Univ. of Manchester, Manchester ; Hu, Z.

A novel thin metamaterial wideband radar absorber formed by two layers of resistive Hilbert curve arrays is reported. HFSS simulations reveal a reduction in the monostatic radar cross-section of more than 10 dB from 8 to 18.8 GHz (81 fractional bandwidth) for E x and 9.1 to 20.7 GHz (78 fractional bandwidth) for E y polarisations, respectively. This bandwidth is significantly wider than those reported so far for space filling curve array based absorbers. The structure has a thickness of only 0.17lambda at f o (14.2 GHz). The lateral dimensions are only 0.2 0.2 per unit cell at f o, which is several times smaller than that of recently reported circuit analogue absorbers operating in the similar frequency band, thus suppressing diffraction effects.

Published in:

Electronics Letters  (Volume:45 ,  Issue: 2 )