Masters Theses


"This thesis comprises of two parts. Firstly, the Flyover Quad Small Form Pluggable (FQSFP) approach for 56+ Gbps applications is introduced to overcome the limitations from a large loss on typical QSFP ports with surface mount to Printed Circuit Board (PCB) traces. By replacing the PCB traces to the twinax cables, it is possible to achieve around 7 dB lower insertion loss at 40 GHz for the 12-inch path from the switch IC to connector than that of PCB trace with a low loss substrate. Also, to investigate electromagnetic interference (EMI) aspect of FQSFP approach, a simulation model of FQSFP has been developed which corroborates favorably with measurement profiles of time domain reflectometry (TDR) at FQSFP port and total radiated power (TRP) from FQSFP in a test vehicle. Furthermore, the EMI profile of the FQSFP after integration of the cage has also been studied.

The second portion of the thesis includes the system level implementation of a novel Z-directed component (ZDC) capacitor studied in two phases. Firstly, the ZDC interaction with planes is modelled using full wave 3D simulation and the impedance profile is compared to that of a regular decoupling capacitor, when it is placed far away from the Integrated Circuit (IC). Secondly, utilizing a commercial tool, the ZDC is implemented on a real PCB design where the local decoupling capacitors underneath the IC are replaced with ZDC and their performances are compared. It is shown that the high frequency performance can be significantly improved by reducing the current path inductance, the advantage of using ZDC"--Abstract, page iii.


Drewniak, James L.

Committee Member(s)

Pommerenke, David
Hwang, Chulsoon


Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering


Missouri University of Science and Technology

Publication Date

Spring 2019


xii, 57 pages

Note about bibliography

Includes bibliographical references (page 56).


© 2019 Pranay Kumar Vuppunutala, All rights reserved.

Document Type

Thesis - Open Access

File Type




Thesis Number

T 11557

Electronic OCLC #