基于印刷电路板的共面波导到非辐射介质波导的转换电路研究

Substrate integrated nonradiative dielectric (SINRD) waveguide fabricated directly on printed circuit board (PCB) or metalized dielectric layer, with its excellent performances of simplifying fabrication process and minimizing mechanical errors, is vitally essential at the microwave and millimeter-wave frequencies. In this paper, both double-layer and triple-layer transitions of coplanar waveguides (CPW) to the SINRD waveguides based on the former technique are presented, providing effective interconnects for compactly and flexibly integrating the planar-CPW-based devices with the SINRD waveguide circuits. It is found that simulated results are in good agreements with the measured results, which proves the promising future of the SINRD waveguides based on PCBs in the area of mm-wave hybrid integrated systems.