Terahertz Band Propagation Characteristics of Coupling Multiconductor Transmission Lines in Multilayer Media

The study on terahertz radiators will not only boost the development of theoretical research, but also raise severe challenges to solid-state electronics and circuit technology. In the present paper, the transmission characteristics of microstrip-slot coupling structures are primarily studied in 1-3THz band. Based on the single-layer dielectric structure, a double-layer dielectric microstrip-slot coupling structure with air as one layer is presented. It is reported that adding air layer based on the single-layer structure helps reduce the loss. Besides, given the factors of Engineering processing, the structure of three-layer media is also proposed; it is found that the structure of three-layer media still has exhibits transmission loss when the engineering realization is satisfied. However, this study suggests that the loss of the three-layer structure is higher than that of the two-layer structure, whereas the effect is better than that of the single-layer structure.