This study proposes a novel spoof surface plasmon polariton (SSPP) transmission line unit based on a coplanar waveguide (CPW) design. The dispersion relationship is derived from its equivalent circuit. and a low-pass notch filter is designed accordingly. operating in the frequency range of 0 GHz to 4. https://www.revivedfurnitureandhomedecores.shop/product-category/garlands/