A Metamaterial Based RF Absorber Electronically Reconfigure for an Efficient DC Low Power Generation

Abstract

The number of split ring resonator (SRR) and complementary split ring resonator (CSRR) configurations which are considered as the popular metamaterial structures for energy harvesting applications have been investigated through the numerical computations. The study was performed for characterizing their electrical properties and the potential performance at certain application. The investigation results on the design of the double- T Rf energy absorber exhibited excellent electrical performance. The absorber could run in multiband frequencies and has a large bandwidth. The desired absorber device has been optimized by altering the physical dimensions of the SRR and CSRR meta material structures. By etching the two SRR unit cells and six CSRR unit cells in the grounding area, the proposed absorber shows great performance in terms of the return loss, gain, and bandwidth parameters. Also, the reconfigurable absorber design could be maximized for absorbing of the sustainable potential RF harvesting energy that both emitted from the licensed and unlicensed RF communication devices. The absorber covers the frequency spectra of GSM900 Band, GSM1800 Band, WiMAX Band, and ISM Band applications, respectively. This absorber is good for absorbing RF energy with a smaller physical size of 72.25% compared to the conventional designed one.