Dual resonance shorted stub circular rings metamaterial absorber

In this research work, the design characterization of metamaterial absorber (MMA) has been analysed for a unit cell structure of shorted stubs circular rings metamaterial absorber. The simulated results show that dual resonance peaks occur at 17 GHz and 18 GHz with absorbance peak response of 99.99% and 99.83%, almost unity absorbance. The corresponding full width at half maximum (FWHM) bandwidth at these resonant frequencies are 4.90% and 5.07% respectively. A parametric study has been done to analysed the effect of variation of circular ring radius, shorted stubs length and rectangular bar length upon the resonance frequency. The analysis shows that we can achieve a lower resonant frequency with almost unity absorbance. Moreover, the resonant frequency drifts to lower value without affecting absorbance. The effect at oblique angle of incidence and polarization sensitivity is also considered for both TE and TM modes. So, this unit cell structure acts as a controllable and tunable MMA structure. The dual resonances MMA structure are becoming a prime technology for many present and future wireless communication systems such as radar cross section (RCS) reduction for stealth technology, satellite navigation systems, radar frequency identification and wireless handheld devices.