Investigation of a cylindrically conformed reconfigurable microstrip parasitic array
Hankour, Imane
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https://hdl.handle.net/2142/129790
Description
Title
Investigation of a cylindrically conformed reconfigurable microstrip parasitic array
Author(s)
Hankour, Imane
Issue Date
2025-05-09
Director of Research (if dissertation) or Advisor (if thesis)
Bernhard, Jennifer T.
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Antenna
Pattern Reconfigurable
Conformal
Language
eng
Abstract
Reconfigurable antennas capable of altering or steering their radiation patterns are highly advantageous in wireless communication systems. A pattern reconfigurable antenna adaptable to its immediate environment provides additional flexibility in overcoming a number of challenges presented by complex networks. One example of such an antenna is the reconfigurable microstrip parasitic array (RMPA) composed of two parallel parasitic strips to either side of a single driven element. Controlling the electrical length of the parasitic elements allows for beam tilting in the H-plane. In this work, an RMPA designed for pattern reconfigurability at 5.8 GHz is simulated on a singly curved surface with its H-plane oriented along elevation to study the effects of curvature on the structure. The minimum S11 frequency of the antenna is observed to decrease with the radius of curvature. Additionally, the pattern reconfigurability behavior is lost. A parametric analysis is performed on several design parameters to recover beam tilting capability. This includes independent modifications to the conductive elements and the grounded dielectric structure. The addition of slots or notches in the grounded dielectric restores the ability to reconfigure the radiation pattern at the lower minimum S11 frequency of 5.20 GHz. Implementing a cavity in the dielectric directly behind the driven element significantly improves the impedance match and beam tilting performance at 5.94 GHz.
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