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Analysis and design of coplanar waveguide for high-speed pulse propagation on printed circuit board

Analysis and design of coplanar waveguide for high-speed pulse propagation on printed circuit board / Mohd Muhalyiddin Abdullah
Tujuan tesis Ini adalah untuk menyelidik struktur pandu gelombang sesatah (CPW) yang sesuai bagi kegunaan papan litar (PCB) untuk perambatan dedenyut berkelajuan tinggi, untuk menjalankan kajian menyeluruh mengenai citi-ciri perambatan dan juga untuk membandingkan keupayaan dengan talisn mikrostrip. Rumus-rumus rekabentuk telah dibangunkan berdasarkan rumus-tumus yang asalnya disyorkan kepada MMIC dan silikon CPW. Kemudiannya, rumus-rumus ini telah digunakan untuk mengoptimumkan rekabentuk CPW dimana keputusan-keputusannya menunjukkan perbezaan sebanyak 15% dibandingkan dengan keputusan-keputusan simulasi. Analisa-analisa domain frekuensi dan domain waktu telah dijalankan secara menyeluruh untuk mengenal pasti kesan parameter-parameter CPW ke atas keupayaan perambatan dedenyut. Selepas itu, satu litar prototaip telah dibangunkan untuk mengesahkan keputusan-keputusan teort dan simulasi. Ukuran bacaan eksperimen menunjukkan petsamaan yang ketata dengan keputusan-keputusan teon dan simulasi disamping mengetengahkan beberapa isu Jain. Berlawanan dengan pendapat popular yang mengatakan CPW lebih berkeupayaan dart talian mikrostrip berdasarkan pengalaman MMIC, tesis ini menunjukkan berbagai isu-isu bagi aplikasi CPW di atas papan litar seperti kejadian salunan (resonance) mendatar dan menegak yang kuat. Menariknya, isu-isu ini tidak dikesan di dalam mana-mana simulasi mengunakan model ADS ataupun dan rumus-rumus rekabentuk. Lalu, tesis ini telah berjaya mengesyorkan pendekatan-pendekatan altematif untuk simulasi ADS dan tUrTIus-tumus bagi memberi ramalan yang lebih realistik kepada citi-Ciri litar yang sebenar. Terakhirnya, beberapa topik kajian berkenaan dengan papan fitar CPW telah disyorkan untuk kajian mendalam bagi menjadikan struktur CPW lebih popular untuk kegunaan dedenyut berkelajuan tinggi di atas papan litar. _______________________________________________________________________________________________________ The goals of this thesis are to investigate a suitable printed circuit board (PCB) coplanar waveguide (CPW) for high-speed Signal propagation application, to conduct thorough analyses of its propagation characteristic and to compare its performance against the mainstream microstrip line. Design equations are developed by adopting expressions that are originally proposed for monolithic microwave integrated circuit (MMIC) and silicon CPW. Then, these equations are employed for optimized CPYI designs whereby the results are compared to simulations outputs for sanity checks that showed 15% differences. Extensive frequency and time domain numerical analyses are conducted to access the impacts of each CPW parameters to signal propagation performance. Subsequently, a prototype circuit is built to verify theoretical and simulations results. Experiment results show excellence correlations to theoretical estimates as well as exposed some potential issues. Contrary to popular beliefs that CPW has superior performance than microstrip based on MMIC experience, this thesis unveiled various CPYI issues for larger scale PCB implementation such as severe lateral and longitudinal resonances. Interestingly, these issues are not detected by ADS simulations using the built-in CB-CPW model or by the design equations. Thus, the thesis has successfully proposed alternatives approaches for ADS simulations and design equations for more realistic predictions of the actual circuit characteristics. Lastly, a few potential research topics on PCB CPW structures were highlighted for further researches for making CPW to be more compelling for high-speed PCB implementations.
Contributor(s):
Mohd Muhalyiddin Abdullah - Author
Primary Item Type:
Thesis
Language:
English
Subject Keywords:
(PCB); (CPW); (MMIC)
First presented to the public:
9/1/2007
Original Publication Date:
1/29/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 145
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-01-29 17:18:53.003
Submitter:
Mohd Jasnizam Mohd Salleh

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