Study of Complementary Loop Integrated Metasurface for 6G THz Communication

This article investigates the complementary frequency selective surface based metasurface structure that operates at 0.82 THz frequency. Various metasurface structures with single and multi-layered substrates have been reported in literature for sixth generation systems. Here, we review various potential metasurface structures for THz communication. Moreover, a dual complementary loop integrated three-legged structure and related loop integrated metasurface has been studied. The complementary loop integrated is embossed on a polydimethylsiloxane substrate to achieve better angular stability over 0° to 85° with a maximum frequency deviation of 0.05%. The choice of substrate is also investigated with their flexibility and suitability for THz frequency. The equivalent circuit model we analyzed for complementary loop integrated and conventional approaches. The results depict that the complementary structure can achieve better angular stability over the incident angle of 0 to 85 for both TE and TM modes.