University of Oulu

Bluetooth antennas based on stretchable inks and substrates : a comparative study between different antenna structures

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Author: Amin, Belal1
Organizations: 1University of Oulu, Faculty of Information Technology and Electrical Engineering, Communications Engineering
Format: ebook
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3.8 MB)
Pages: 62
Persistent link:
Language: English
Published: Oulu : B. Amin, 2020
Publish Date: 2020-05-25
Thesis type: Master's thesis (tech)
Tutor: Berg, Markus
Reviewer: Vuohtoniemi, Risto
Berg, Markus


Wearable technologies are expanding to consider different industries and systems such as healthcare solutions. Therefore, flexible, and stretchable electronics have gained huge attention recently since it made realizing a high performance, easy to use, comfortable, and durable electronics solutions possible. Wireless systems are also required to fit with wearable technologies, which include antennas. Therefore, a lot of research was focused on building stretchable and flexible antennas that are cost-effective, and easy to manufacture and integrate with existing solutions. One of the biggest challenges in stretchable antenna design is that antenna’s radiation properties are dependent on the physical geometry of the antenna itself. Hence, utilizing existing 2D-based antennas that can maintain acceptable performance under stretching can be a challenging task.

In this thesis, I will investigate different antenna structures manufactured using commercially available inks EMS CI1036, ASAHI LS 411AW, and DUPONT PE874 as well as thermoplastic polyurethane substrates (TPU) Platilon U9122 and Platilon U073. I also studied the effect of stretching on the dipole, and meandered monopole antenna’s performance and reported the simulation and measurement results when stretching the antennas up to 20% of its original length. I have also developed a novel algorithm for the placement and orientation process of the antenna on the TPU so that the effect of stretching on its performance is minimal. I have found that meandered monopole antenna can be a good candidate for stretchable applications due to its symmetrical response to stretching regardless of the stretching dimension, however, in other cases discussed in the thesis, I have shown that wire monopole or dipoles can be an excellent choice for stretchable applications in specific cases.

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Copyright information: © Belal Amin, 2020. This publication is copyrighted. You may download, display and print it for your own personal use. Commercial use is prohibited.