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Master Thesis Prezi
Transcript of Master Thesis Prezi
on Paper Substrate by: Reza Moossavi Designing Antennas Measuring Ink Conductivity Introduction to Printed Electronics Q
A Conclusion & Discussion Applications Solar Cells RFID Tags E-Paper OLED & TFT Displays Printed Antennas Printed Electronics Field of printing electronic circuits and components on various types of media such as paper, textile, different types of polymers and lots of other potential media. Conductive Inks Metal nano-particles
Metallo-organic decomposition Both require post printing treatment known as "Annealing", "Sintering" or "Curing" and can be done in various methods:
Chemical (Room temperature) Conductive ink based on Metal nano particles Curing (Annealing) The problem is, the nano-particles should melt totally to provide conductivity close to of the bulk metal. Metallo-organic decomposition inks Annealing Annealed Unannealed Conductivity Measurement Nano-Silver Paste manufactured by Harima (54% of wt. silver particles) Found in two types: Before I begin ... I would like to thank: Prof. Anders Rydberg Dr. Ir. Dragos Dancila Doc. Zhibin Zhang My Supervisors and tutors in Uppsala University Emerging Electronics & Microwave Engineering Group for being awesome and for all the fun Department of Solid State Electronics for their patience and tolerance My supervisor... Dr. Johan Sidén for his constant support, even from long distance Prof. Bengt Oelmann Dr. Najeem Lawal Dr. Benny Thörnberg for the privileges provided at EKS and Mid Sweden University for their supports and helps during a very rough time Staff of EKS, my colleagues and my classmates... for being patient, helpful, supportive and wonderful And... for the moments that will remain with me forever; for all the great memories; for the friendships, for all the awesomeness, and for many many other reasons. It was an honor and a privilege to be here. Antenna Design Extracting dielectric characteristics Patch Antenna Dipole & Quasi-Yagi Antennas For designing a functioning antenna, two key characteristics of substrate should be known: Dielectric Constant
Dielectric Loss Tangent Extracting such characteristics and studying substrates behavior in high frequencies are done by employing a simple structure: "Ring Resonator" OK! What on Earth is a "Ring Resonator"? Ring resonator is a closed transmission line, fed through "Feeding Lines", that are separated from the ring by "Coupling Gaps" Ring Resonator Printed on Glossy photo paper (240µm thick) with Harima NSP-JL Hmm...! Results are good with you! Continue you must! Calculation and design of such antenna requires use of some complex formulas! Remember those complex looking formulas? Good news is: Ansoft HFSS ADK is capable of using those formulas to design a patch antenna in an eye blink! Bad news is: just like any other FEM software, it might not be exactly right! So you have to check the validity of the design by using the same formulas! Once upon a time, a wise person said: for their supports, their encouragements and their patience. Prof. Mattias O'Nils Dipoles are symmetrical antennas and will function best if they're fed through balanced feeding lines. Feeding dipoles through coaxial cables (which are unbalanced feeding lines) requires an adapter to convert such unbalanced line into a balanced feed. This adapter is called balun (balanced+unbalanced) and it has to create 180 degrees phase difference at the center of dipole. Dipole S 11 Quasi-Yagi S 11 Inks with longer shelf time, lower annealing temperatures and higher durability. There are a dozen companies producing conductive inks with about 40 products & lots of DIY recipes. No detailed studies and one literature review! Microwave annealing requires more studies and comparison with other non conventional thermal annealing/sintering Inks based on CNT require more studies; So does Graphene. Miniaturizing antennas, reducing the size, and finding better substrates that are more flexible and cause more efficiency Formulation of environmental friendly and non-hazardous material inks. Silver is poisonous and ... The answer to the Ultimate Question of Life, the Universe and Everything is: 42 I asked Google, and this was the answer. There was no LOL! so it should be true. Remember: It was fun! Eller hur?! Thank you.