Investigation on Meandered Split Ring Resonator for Metamaterial Microwave Absorber Design

In this paper, the classical Split Ring Resonator (SRR), which consists of an inner and outer ring is modified to achieve different lengths of the inner ring. This can be done by using a meandered inner ring. This newly proposed SRR unit cell is investigated at 7 GHz and is implemented in microstrip technology on an absorber substrate, SB 1011. The unit cell is excited by two transmission lines and the insertion loss is evaluated for different values of the inner ring’s length. The transfer characteristic shows that the best results are obtained for a length of 6 mm and that this type of unit cell can be used for designing a microwave absorber with enhanced performances, for 5G applications.