Date of Award

12-2023

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Electrical Engineering and Computer Science

First Advisor

Brian Lail, Ph.D.

Second Advisor

Ming Zhang, Ph.D.

Third Advisor

Ivica Kostanic, Ph.D.

Abstract

I intend to use metasurface materials to adjust antenna field properties while applying a cloaking application to the antenna. Cloaking applications have been used to shield the neighboring antenna waveforms so that they do not affect it’s antenna patterns and reduce the mutual coupling between the two antennas [15], [16]. In this application, I propose a metasurface beam-steering antenna at X-band frequencies using mantle-cloaking techniques to adjust and direct the beam-steering while ignoring other adjacent antenna patterns.

The first part of this application provides a method for cloaking antennas that are close to each other in distance (less than a few millimeters) to decouple them. This will prevent the adjacent antenna from being affected by other antenna patterns nearby. The last part of the design incorporates a metasurface multi-beam steering antenna that directs the beams independently of each other. By combining these two techniques, we can achieve a multi-beam steering antenna that does not distort each antenna’s beam pattern. Numerical finite element methods will be used to compute the designed result using Ansys HFSS [19].

The analysis will show that metasurface cloaking works for various applications to decouple near-field radiation patterns and incorporate a beam-steering component using the mantle cloaking technique. Further work can be contributed to this design approach to create more narrow beams instead of wide beams produced in this study. The design approach used a passive element to direct the beam-steering. In future work, I believed that having an active element would achieve higher results.

Comments

Copyright held by author.

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