Double negative media using interconnected ω‐type metallic particles

We report on broadband low‐loss properties of Ω‐based metamaterials. It is shown that interconnecting elementary current‐loops via their arms can yield to a relative bandwidth of around 70% for infinite arrays. Combining interconnected and disconnected sections permits one to engineer the left‐handed and right‐handed dispersion branches with the prospect of composite artificial media such as those initially proposed by Itoh and coworkers (IEEE Microwave Mag 34 (2004) 34–50) in the context of transmission lines. This typical behavior is interpreted through a lumped element model. At last, some guidelines to optimize the transmission properties of Ω‐shaped arrays are presented. These results are discussed on the basis of recently published data concerning Ω‐shaped and C‐shaped particles.