1：Experimental Design and Method Selection:

The design is based on a traditional CPW feeding structure with periodic holes etched on the middle stripline. The dispersion curves and electric field distributions are used to explain the physical mechanism.

2：Sample Selection and Data Sources:

Two samples of the proposed SSPPs are fabricated with F4B substrate and metallic strips.

3：List of Experimental Equipment and Materials:

Full-wave electromagnetic simulation software CST is used for simulation. The substrate is F4B with εr = 2.65, loss tangent tan δ = 0.0015, and metallic strips have a thickness of 0.018 mm.

4：65, loss tangent tan δ = 0015, and metallic strips have a thickness of 018 mm. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: The S-parameters of the proposed SSPPs are simulated and measured to verify functionality.

5：Data Analysis Methods:

The dispersion curves and electric field distributions are analyzed to predict the characteristic of the proposed SSPPs.