In the area of high-frequency circuit design, coplanar waveguides (CPW) have become increasingly significant, especially in contexts demanding integration and miniaturization . The ground-signal-ground (GSG) configuration of CPWs is particularly notable for its balanced structure, which enhances signal integrity. Characterized by a central conductor edged by two ground planes [see Figure (1)], the GSG CPW offers several advantages over traditional waveguide structures, including reduced substrate thickness and facilitated integration with planar circuit components, which are crucial for compact electronic devices . This communication focuses on the capabilities of an NFA-based phase shifter constructed on a CPW at mmwave frequencies and examines its performance under various voltage, illumination, and temperature conditions. The phase shifter design, devoid of moving parts, renders it particularly suitable for high-speed electronic applications. Furthermore, this research delves into the dielectric properties of the blend, providing insights into its dielectric nonlinearity, thereby enhancing our understanding of light-activated organic materials at mm-wave frequencies and their potential applications in mm-wave systems.