Public defence in Radio Engineering, M.Sc.(Tech.) Riku Kormilainen

Design Methods For Multiport Antennas

M.Sc.(Tech.) Riku Kormilainen will defend the thesis "Design and Optimization Methods for Multiport Antennas" on 18 November 2022 at 12 (EET) in Aalto University School of Electrical Engineering, Department of Electronics and Nanoengineering, in lecture hall AS1, Maarintie 8, Espoo.

Opponent: Prof. Mats Gustafsson, Lund University, Sweden
Supervisor: Prof. Ville Viikari, Aalto University School of Electrical Engineering, Department of Electronics and Nanoengineering

Thesis available for public display at:

Doctoral theses in the School of Electrical Engineering:

Public defence announcement:

Modern wireless communication has evolved greatly within the past 30 years, and antennas are a significant part of the today’s society. Almost everyone has a smartphone equipped with multiple antennas, and antennas are found in many everyday household objects and devices such as washing machines, coffee makers, and robotic vacuum cleaners. Furthermore, wearable antennas (such as those in medical devices, clothes, and watches) are becoming increasingly popular.

The trend in wireless communication is to increase the number of antennas and place them in ever more challenging locations. The current available space for antennas is already scarce, which requires to fit antennas close to each other. This makes it difficult to design antennas such that one does not interfere with the other. Furthermore, antennas are placed near lossy structures, such as the human body, which typically decreases the radiated power by the antennas. For the past two decades, electromagnetic simulation software have provided a great way to design antennas. However, future antennas will need systematic design methods to overcome the problems associated with placing antennas in challenging locations.

Therefore, methods for multiport antennas have been investigated and developed in this thesis. These methods aim to lessen the complexity of antenna design by introducing the port related parameters as variables to improve antenna performance. This can allow antenna design with simple well-known structures that only need to be simulated once. Hence, antenna design could be accelerated with these methods. The methods in this thesis range from designing feeding networks for antennas to reduce the interference to developing techniques that enable to improve various design goals, such as efficiency and gain of an antenna, by adjusting antenna port impedances and signals.

Contact information of doctoral candidate:

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