1results about How to "Reduce parasitism" patented technology

This invention provides a coupler and an RF front-end module. The coupler includes a substrate and input waveguides, switching waveguides, coupling waveguides, isolation waveguides, transition waveguides, and output port lines formed on the substrate. The substrate includes a high-resistivity silicon substrate, an oxide buried insulating layer, a first metal layer, a second metal layer, and a third metal layer stacked sequentially. The input waveguides, coupling waveguides, isolation waveguides, and output port lines are spaced apart and formed on the third metal layer, while the switching waveguides and transition waveguides are spaced apart and formed on the second metal layer. This invention enables the coupler to have low parasitics, high narrowband, stable sampling, and low power consumption.