Distributed Hybrid Beamforming Techniques for Random Three Dimensional Arrays
Open Access
Author:
Campbell, Bailey
Graduate Program:
Electrical Engineering
Degree:
Doctor of Philosophy
Document Type:
Dissertation
Date of Defense:
October 04, 2024
Committee Members:
Wooram Lee, Major Field Member Gregory Huff, Chair & Dissertation Advisor Stephanie Wissel, Outside Unit & Field Member Tim Kane, Major Field Member Madhavan Swaminathan, Program Head/Chair
Keywords:
antenna arrays beamforming random arrays volumetric arrays
Abstract:
Antenna arrays comprised of elements randomly distributed in some volume are an underexplored topic. This kind of topology affords several benefits like an increase in element spacing without introducing grating lobes, beamsteering and low sidelobe levels without traditional amplitude tapering, and an effectively infinite scan range without any degradation in pattern. This work specifically explores the application of some traditional beamforming algorithms, like minimum mean quared error (MMSE) and least mean squares to these kinds of arrays. In addition to this exploration, this work details the construction of an experimental platform nabling the testing of these techniques. Medusa 2.0 is the second iteration of a configurable array testbed and features 32 dual-band orthogonally circularly polarized patch antennas, modern software defined radios, and analog beamforming modules which taken together form a versatile experimental tool. In addition, this work summarizes the design and implementation of PyChamber, an open-source tool for performing and automating anechoic chamber measurements. Finally, this work concludes by highlighting the author’s contributions to pedagogy and mentorship.