A precision LTCC based CPWG-SL-CPWG DC-Ku band transition

Low Temperature Co-fired Ceramic (LTCC) is the technology of choice for realization of high frequency Multi-Chip-Modules (MCMs). Transitions are an integral part of these MCMs providing an effective means of connecting two different types of transmission lines. This paper discusses the design and fabrication of a DC-Ku band Co-planar Waveguide with Ground (CPWG) to Stripline (SL) transition in LTCC technology. The deleterious effects of standard fabrication tolerances on transition performance are presented. Changes in screen-printing process parameters are subsequently proposed to improve achievable tolerances and thereby satisfy target specifications.