2026-09-24T15:13:33Zhttps://ubir.buffalo.edu/oai/request

oai:ubir.buffalo.edu:10477/840402025-07-16T19:36:08Zcom_10477_77914col_10477_81567

Beam Forming and Steering Techniques in Antenna and Array Based on Composite Right/Left Handed Metamaterial Ren, Dongyin; 0000-0001-9868-4858 Choi, Jun Electrical Engineering electrical engineering electromagnetics Ph.D. This dissertation aims to explore novel methodologies of realizing beam forming and steering antennas based on composite right/left handed (CRLH) metamaterial. Five CRLH based antenna designs with wide-range beam scanning and flexible beam forming capabilities are examined in this study through in-depth qualitative and quantitative analysis.The first three designs using CRLH leaky wave antennas (LWAs) highlight the cost-effective frequency scanning antenna configurations by combining both radiating and phase engineering elements together. Moreover, reflection-type amplifier and bi-directional amplifier are utilized to enable the beam forming functionality of CRLH LWAs. On the contrast, the following two CRLH transmission line based antenna arrays investigate the extra design freedom of structure with isolated radiating and phase engineering parts. Due to the additional design flexibility, all-passive four-quadrant beam steerable antenna array with polarization and radiation pattern controllability can be achieved. In summary, this dissertation provides a detailed description of the operating mechanism and circuit implementation of beam steering and forming antennas based on CRLH metamaterial. Presented designs are validated through both measurement and simulation results. **To request an accessible version of the file(s) associated with this item, contact library@buffalo.edu. Please include the item's persistent URL [http://hdl.handle.net/. . .] in your request.** 2022-06-21T15:47:18Z 2022-06-21T15:47:18Z 2020 Text Dissertation http://hdl.handle.net/10477/84040 eng Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions. Copyright retained by author. application/pdf State University of New York at Buffalo