Toward Simple Dynamic Metasurface Antennas for Reconfigurable Beamforming and AoA Detection
Description
Dynamic metasurface antennas (DMAs) consist of waveguides patterned with numerous metamaterial radiators loaded with switchable components (such as varactors). Byapplying different direct current (DC) signals to each element, DMAs can generate a multitude of radiation patterns ranging from directive beams useful for wireless communication to spatially diverse ones useful for computational imaging and sensing. In this thesis,
DMAs are extended to conformal configurations. Using full-wave simulation, it is shown
that a conformal DMA can detect the angle of the incident signal over the horizon using a
two port device at a single frequency. The design and operation of the conformal DMA will
be detailed. In addition, it shows that DMAs can be implemented using a single substrate
layer, significantly simplifying its structure compared to conventional multiple-layer ones.
Using full-wave simulation, this thesis demonstrates a mechanism to bring DC signal to
metamaterial elements without requiring an extra layer. This design can be instrumental in
implementing the conformal DMA in the future
AoA detection was achieved over unique diode distributions of the conformal DCMA
at a 10-degree resolution. Investigations into additive noise of the simulated measured
data as well as the minimum amount of diode distributions to accurately detect AoA were
conducted and documented within this thesis. The single-layer DMA yielded both directive
and complex patterns that allow for many potential applications. With success in bringing
the DC signal to the metamaterial elements on a single-layer, further advances in conformal
DMAs can be achieved.
Date Created
The date the item was original created (prior to any relationship with the ASU Digital Repositories.)
2024
Agent
- Author (aut): Williams, Travis Hugh
- Thesis advisor (ths): Imani, Seyedmohammadreza F
- Committee member: Aberle, James
- Committee member: Trichopoulos, Georgios
- Publisher (pbl): Arizona State University