Abstract
An energy selective surface (ESS) with ultra-wide band (UWB) protection is proposed in this paper, which is able to provide a passband when the incident wave is at low power level and a stopband when it is high. PIN diodes is chosen to realize the state transition due to their nonlinear property. A full-wave simulation is carried out for optimizing the dimensions of the ESS. The simulated results show that a passband with a -3 dB bandwidth of 640 MHz is obtained at low power level, which has the insertion loss of 0.01 dB at 4.36 GHz. Also, an ultra-wide protection band with the relative bandwidth of 200% is realized at high power level. In addition, the ESS has a good angular stability and polarization independence.
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