Substrate integrated image guide (SIIG) - a low-loss waveguide for millimetre-wave applications

Abstract

A novel synthesized version of the wellknown rectangular dielectric image guide is presented in this work for low-cost millimetre-wave applications. Lower effective permittivity regions surrounding a guiding channel were artificially created by using a laser to cut a triangular hole lattice in low-loss high permittivity substrates. Simulation and measurement results for straight sections of such a substrate integrated image guide (SIIG) in TMM substrate and high resistivity silicon are presented. Specific properties of the structure with respect to electromagnetic band gaps (EBG), radiation and leakage, design flexibility, fabrication, and integration in the context of substrate integrated circuits (SIC) are discussed for the first time.

Silicon-on-Glass Dielectric Waveguide—Part II: For THz Applications

“…To alleviate the alignment issue, a synthesized dielectric image guide based on the perforation of the dielectric substrate was reported [12], [13]. However, this technique suffers from the additional scattering loss due to the periodic air holes.…”

An Analysis Technique for Post-Wall Waveguides

“…In [14], two walls of dielectric posts are used as a frequency selective surface, leaking power into a central guiding region. Structures with the primary goal of wave-guidance are investigated in [15], [16], [17] and [18]. In [15], a study on wave-propagation feasibility is presented based on finite-difference time-domain simulations, where the top and bottom boundaries of the guide are dielectric layers.…”

“…Guides consisting of infinitely-long square posts are analyzed in [16], where the reflection at the walls is modeled by means of transmission matrices. Finally, in [17], [18] a post-wall waveguide resembling an image guide with a metal bottom plate and no top plate is designed based on FEM simulations, fabricated and tested. The same authors use the image guide to produce an antenna with a fan beam in [19].…”

Design of post-wall waveguides with metal and dielectric posts

“…The dielectric post-wall waveguide is not extensively treated in literature. Examples are the post-wall waveguide with low dielectric material on top and bottom, as presented in [4], and the variation on the dielectric image line, with a metal ground plane on the bottom, as presented in [5], [6]. These guides are designed using brute-force numerical tools based on FEM or FDTD solvers.…”