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An electrical tunable L-band absorbing material for two polarisations is presented. The proposed absorber consists of a metal resonator and four surrounded metal lines which are connected by pin diodes, and exhibits the tunable range of reflectivity reaching to -40 dB for both polarisations. In particular, for TM polarisation, the working frequency is also tunable from 1.9 to 2.1 GHz due to the conversion...
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