Design and exploration of functioning of a D-Z shaped SNG multiband metamaterial for L-, S-, and X-bands applications

A design and performance analysis of a new triple-band metamaterial (MTM) is imparted in this article. The proposed MTM is able to produce three operating frequency bands and can be applicable for L-, S-, and X-bands applications. The L- band and S-band frequency responses are caused by electric resonance, and the X-band is generated by magnetic resonance. The triple-band response is produced by combining two open D-shaped loops coupled with a Z-shaped metal strip. To conclude the electromagnetic behaviour of the proposed MTM, the Nicolson Rose Weir method is utilized, and effective parameter extraction from reflection and transmission coefficient is done. Then the parametric analysis is done by changing the arm length of the loop, varying the capacitive gaps of the structure to analyse the performance of the proposed structure. Moreover, the equivalent circuit analysis of three individual frequency bands is performed for a clear understanding of the resonance phenomena of the proposed MTM. Besides, the analysis of 1x2, 2x1, 2x2, and 4x4 array structures of the unit cells is done to validate the activities of the MTM because array structure is often needed to improve the performance of an antenna. All the structures reveal their triple-band operation and promising for L-, S-, and X-bands applications. The proposed MTM unit cell exhibits a larger effective medium ratio (17.7) for the lower frequency band. So, the projected compact MTM is a promising solution for different microwave applications.