Title | Reconfigurable Monopole Antennas with Circular Polarization |
Publication Type | Thesis |
Year of Publication | 2015 |
Authors | Panahi, A |
Academic Department | School of Electrical & Electronic Engineering |
Pagination | 126 |
Date Published | 07/2015 |
University | Dublin Institute of Technology |
City | Dublin, Ireland |
Degree | PhD |
Abstract | This thesis presents research on printed circularly-polarized monopole antennas and their application in reconfigurable monopole antennas. The proposed circularly-polarised monopole antennas benefit from advantages such as small size, low-cost, low-profile and simple designs. The first part of this thesis introduces three printed circularly-polarized monopole antennas for global navigation satellite systems and Wi-Fi applications. The primary focus is on the ground plane which is used as a radiating component in realizing circular-polarization. It is shown that by employing the ground plane as a radiator results in a wide axial ratio bandwidth. The radiation patterns of the antennas and their relationship with antenna ground plane sizes is investigated. Then, a frequency-reconfigurable monopole antenna with circular-polarization for wireless local area networks and global navigation satellite systems is presented. The ground plane current distribution, rearranged by a switch, enables the right-hand circularly-polarized band to move in frequency from the GPS band to Wi-Fi frequency bands. |
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