Abstract:
In order to achieve the absorption curve with broadening (within 11GHz~14GHz band) and tunable bandwidth under TE wave, a new metamaterial absorber was proposed whose periodic structural unit adopted honeycomb-shaped hexagonal structure.The parametric analysis chart of the absorber was calculated.The effects of variables
g and
d on absorbing band and absorbing bandwidth were studied.The cause of bandwidth broadening of the etched cross-shaped absorber was also explained.The results show that, absorption rate of the absorber in the low frequency domain at 9.17GHz~9.5GHz is over 90%.When different plasma resonance regions are excited, the time-frequency domain absorption of the absorber can be realized.And the absorptive capacity of the absorber can be improved.By changing the variables
g and
d, the dynamic control of the absorption band can be realized.The absorption bandwidth in the high frequency domain can be widened by etching cross-shaped structure in a square structure.Its absorption rate in the frequency domain of 12.08GHz~13.91GHz is higher than 90%.By changing the variable
s, the absorption band can be obviously widened.The absorber is insensitive to the angle of incident electromagnetic wave.The design idea provides an effective way to broaden the absorption bandwidth of absorbers.