Electromagnetic properties of inverted ΠΠ dielectric waveguides

We present the inverted ΠΠ dielectric waveguide as an alternative for designing microwave devices as well as electromagnetic band gap structures. Inverted ΠΠ dielectric waveguides in cascade, and with high-index contrast, are enclosed by metallic rectangular waveguides. The generalized scattering matrix concept, together with the generalized telegraphist equations (GTE) formulism and the Modal-Matching Technique (MMT) were implemented for theoretical analysis. Numerical and experimental results confirm the possibilities of the new dielectric waveguide for designing single and low-cost microwave devices.