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Permanent link (DOI): https://doi.org/10.7939/R3QZ22X35

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Liquid Metal Based Test Structures and Reconfigurable Microfluidic Microwave Devices and Antennas Open Access

Descriptions

Other title
Subject/Keyword
Liquid Metal
Microfluidic Electronics
Reconfigurable Antennas
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Zandvakili, Mersedeh
Supervisor and department
Mousavi, Pedram (Mechanical Engineering)
Sameoto, Dan (Mechanical Engineering)
Examining committee member and department
Tsai, Peichun (Mechanical Engineering)
Chung, Hyun-Joong (Chemical Engineering)
Department
Department of Mechanical Engineering
Specialization

Date accepted
2017-04-24T15:56:22Z
Graduation date
2017-11:Fall 2017
Degree
Master of Science
Degree level
Master's
Abstract
Electrically reconfiguring communicational devices suffer from a number of drawbacks: incorporating electrical elements such as varactors in unit cell level to manipulate the inductance/capacitance of the circuits and maintaining RF/DC interference isolation in power supply is very challenging. In this thesis, a mechanical tuning approach for communicational devices is proposed with stretching or curving these devices. Devices are fabricated based on the gecko-fluidic reversible bonding technique with EGaIn liquid metal (LM) as their conductor and a new thermoplastic substrate (SEBS) with a versatile and cost effective manufacturing method. Selective filling of complex micro-fluidic features is realized with the use of hydrophobic valves which are optimized based on the measured critical pressure of oxidized EGaIn for filling SEBS channels. Laplace barriers are used to achieve “auto-filling” of extremely low aspect ratio channels of LM in SEBS substrate. Furthermore, a technique for making multiple discrete units of LM features from a monolithic injected LM pattern. As a proof of concept, mechanically reconfigurable antennas such as a half-wavelength folded dipole, a multilayer dipole with a soft via, and a micro-strip patch are fabricated and measured for tuning in their center frequency. A super stretchable beam reconfigurable FSS is also manufactured which shifts its beam direction by stretching or curving.
Language
English
DOI
doi:10.7939/R3QZ22X35
Rights
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
Citation for previous publication
M. Zandvakili, M.M. Honari, D. Sameoto, and P. Mousavi, “Microfluidic Liquid Metal Based Mechanically Reconfigurable Antenna Using Reversible Gecko Adhesive Based Bonding,” Microwave Symposium (IMS), 2016 IEEE MTT-S International, 22-27 May 2016 (published)M. Zandvakili, M.M. Honari, P. Mousavi, and D. Sameoto, “Liquid Metal Based Reconfigurable Microfluidic Microwave Devices and Antennas” (prepared for submission)H. Moghadas, M. Zandvakili, D. Sameoto, and P. Mousavi, “Beam Reconfigurable Aperture Antenna by Stretching or Reshaping of a Flexible Substrate,” IEEE Antennas and Wireless Propagation Letters, issue 99 (accepted for publication)M. Zandvakili, H. Moghadas, D. Sameoto, P. Mousavi, “Mechanically Tunable Periodic Electromagnetic Surface Using Stretchable Polymer,” iv Antenna Technology and Applied Electromagnetics (ANTEM), 2016 17th International Symposium, 10-13 July 2016 (published)

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