Date of Award
Program or Major
Electrical and Computer Engineering
Master of Science
Kent A Chamberlin
Michael J Carter
Nicholas J Kirsch
The work presented here explores the broadband matching characteristics for repre-sentative circuits with resistive terminations for frequencies up to 40 GHz, the typical band of interest for 100 Gigabit Ethernet (100GbE) applications. A simple test circuit comprised of high-frequency connectors, microstrip transmission lines and resistive terminations was de-signed and fabricated to better understand the mechanisms affecting broadband matching.
High fidelity measurements were performed using both a vector network analyzer (VNA) and a time-domain reflectometer (TDR). The data provided by these two devices were used to isolate the broadband behavior of the individual circuit components through the time-gating process, and that process showed the microstrip transmission line on FR-4 to be the greatest contributor to high-frequency mismatch. One facet of the work presented here was to explore the accuracy of a state-of-the-art electromagnetics model in estimating the broadband behavior of the test circuit. Comparisons of measured and modeled data are provided here, and those comparisons show reasonable agreement.
Klempa, Michael, "BROADBAND MATCHING FOR CIRCUITS WITH RESISTIVE TERMINATIONS" (2017). Master's Theses and Capstones. 1111.