Dispersion Engineered Radiative & Guided-Wave Electromagnetic Structures for Efficient Wave Control
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This thesis presents two novel dispersion engineered structures for controlling the propagation properties of EM waves. The first structure is a low-profile dielectric choke ring for multipath mitigation for GNSS applications. The proposed structure has a dual-band surface impedance resonance around the GNSS bands of L2 and L1. An in-house choke ring prototype of the proposed design was tested with the DM antenna. A high multipath rejection in both GNSS bands is experimentally confirmed with comparable performances to an otherwise bulky, heavy, and expensive conventional metallic choke ring. The second structure is an amplitude-equalized group delay device, called a phaser, for ASP applications, implemented at microwave and mm-wave frequencies. The proposed devices achieve a flat magnitude transmission while preserving their strong dispersive delay response. Both types of phasers are demonstrated using full wave simulations, with experimental demonstration currently underway for the active configurations.
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Copyright © 2018 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
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