Radiation losses in Substrate Integrated Waveguides: A semi-analytical approach for a quantitative determination

Substrate Integrated Waveguides, an emerging technology for microwave and mm-wave circuits, are affected by three loss mechanisms: Ohmic and dielectric, as standard waveguides, and radiation. While for Ohmic and dielectric losses equations to determine the expected deterioration are available, for radiation loss no quantitative relationship was derived. This paper presents a semi-analytical approach to predict the attenuation constant due to radiation loss in Substrate Integrated Waveguides.