Date of Award
Master of Science in Electrical Engineering (MSEE)
Increases in signal speeds and decreases in dimensions pose increasing threats to signal integrity (SI) and electromagnetic compatibility (EMC) in differential interconnects due to the enhanced risk of common mode (CM) conversion. This thesis examines CM filtering solutions for multiple transmission topologies that mitigate CM noise, reducing the threat to SI and EMC. These topologies include microstrip and stripline, which are the most commonly used transmission line architecture in printed circuit boards (PCB), and broadside coupled coplanar waveguides (BC-CPW). Stripline and BC-CPW transmission lines have lower dispersion and attenuation than the commonly used microstrip but have added complexity in introducing the signal to the transmission line in a PCB environment. Differential signal launches are introduced that maintain differential transmission from DC to 20 GHz with less than -8 dB of common mode conversion and better than -3.5 dB.
Bergstedt, Zachary Thomas, "Differential Launch Structures and Common Mode Filters for Planar Transmission Lines" (2018). Graduate Theses - Electrical and Computer Engineering. 9.