Dispersion Engineered Radiative & Guided-Wave Electromagnetic Structures for Efficient Wave Control

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Creator: 

Emara, Mohamed Karam Abdelmaboud

Date: 

2018

Abstract: 

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.

Subject: 

Engineering - Electronics and Electrical

Language: 

English

Publisher: 

Carleton University

Thesis Degree Name: 

Master of Applied Science: 
M.App.Sc.

Thesis Degree Level: 

Master's

Thesis Degree Discipline: 

Engineering, Electrical and Computer

Parent Collection: 

Theses and Dissertations

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