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Radio Frequency Characterization and Modelling of Low Temperature Co-Fired Ceramic (LTCC) Material and Devices Open Access


Other title
CBCPW Electromagnetics Simulation
LTCC Dielectric Characterization
Dielectric Constant and Loss Tangent Calculations
Substrate Material Measurement Techniques
Type of item
Degree grantor
University of Alberta
Author or creator
Kalantari, Fatemeh
Supervisor and department
Moez, Kambiz (Electrical and Computer Engineering)
Examining committee member and department
Mousavi, Pedram (Electrical and Computer Engineering)
Moez, Kambiz (Electrical and Computer Engineering)
Daneshmand, Mojgan (Electrical and Computer Engineering)
Department of Electrical and Computer Engineering
Integrated Circuits and Systems
Date accepted
Graduation date
Master of Science
Degree level
The focus of this dissertation is on the characterization of Low Temperature Co-fired Ceramic (LTCC) for microwave and Radio Frequency (RF) applications. The LTCC substrates’ excellent microwave properties make them great candidates for the packaging of RF devices, as well as the fabrication of passive RF and microwave components. In order to utilize LTCC, the first step is to characterize its microwave properties including the dielectric constant and loss tangent which will enable designers to design and simulate the RF behavior of LTCC components accurately. Investigating various measurement techniques, we decided to use a parallel plate capacitor for the characterization of a LTCC substrate from 100 MHz to 1 GHz and a conductor backed coplanar waveguide from 1 GHz to 10 GHz. After fabrication of several test structures on Dupont 951 LTCC substrates, the scattering parameters were measured using a 110 GHz Vector Network Analyzer and the effect of the pads were de-embedded from measurement results. Through this process, we developed a novel fast de-embedding method which de-embeds the effect of the pads and parts of the transmission lines as opposed to the conventional method, where only the effect of the pads is removed. This will result in a similar electromagnetic field around the de-embedded structure to that of a test structure where no pad exists. Therefore, the proposed de-embedding method produces more accurate loss tangent and dielectric constant results compared to the conventional method.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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