Date of Award
The concept of cloaking has been prevalent in emerging research, being able to hide oneself completely from outside observers would be a huge benefit for covert surveillance and other fields. This idea has expanded past optical invisibility into the field of electromagnetic invisibility. To accomplish this form of cloaking, a non-natural material, called metamaterials, must be used. Furthermore, metamaterials can be used in a variety of different techniques including transformation-based cloaking, transmission line cloaking, and scattering cancellation cloaking. One application of cloaking is to use scattering cancellation to decouple two antennas that are placed too closely together such as in Shefali Pawar’s “Cloaking of Slot Antennas at C-Band Frequencies Using Elliptical Metasurface Cloaks". Pawar's results were recreated and the new results were compared to the original findings. Through the use of elliptical metasurface cloaks, antennas operating at 4.5 and 5.5 GHz were decoupled in both the near-field and far-field while also achieving a high total efficiency. This concept was depicted showing the isolated 4.5 GHz and 5.5 GHz antennas, the deterioration of the coupled uncloaked case, and the restoration of those proprieties for the decoupled cloaked case. Then, this idea was then further expanded upon by adding the design to a 4x1 array of antennas and shown to work for beam scanning.
Ferro, Daniel, "The Use of Scattering Cancellation to Cloak and Decouple Slot Antennas and Antenna Arrays" (2023). Honors Theses. 2868.
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