Highly dispersive delay structure exploiting the tight coupling property of the CRLH-CRLH coupler for enhanced resolution analog signal processing

A novel dispersive delay structure (DDS) based on a CRLH-CRLH coupler is proposed, analyzed using a quasi-TEM transmission line model, and demonstrated by both full-wave and experimental results. Compared to conventional all-pass C-sections, the proposed CRLH based DDS provides a much larger group delay swing, thereby leading to much higher resolution in analog signal processing (ASP) applications, due to its capability of providing extremely high coupling levels.