Abstract
In this paper, dielectric ribbon waveguides (DRWs) are designed and characterized to work in the $F$ (90–140 GHz) and $G$ (140–220 GHz) frequency bands. High resistivity silicon (HR-silicon) due to its high transparency in these bands, and its low-cost fabrication process, were selected for the fabrication of these waveguides. The guided modes of DRW are studied using Marcatili and multi-line methods. A design procedure for optimal single-mode propagation was introduced. The wave attenuation inside the waveguide is discussed. Our experiments show that HR-silicon DRW has less than 0.087 dB/cm (0.01 ${\hbox{cm}}^{-1}$ ) of loss over the guiding bandwidth. The designed DRWs were realized using microfabrication techniques. The measurements are in very good agreement with theoretical predictions.
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More From: IEEE Transactions on Terahertz Science and Technology
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