Improving Directional Properties of Circularly Polarized Dish Parabolic Antennas through Knife-Edge Metallic Scatters

Authors

Ali Houssein Harmouch, Department of Telecommunication, College of Engineering, Ahlia University, Manama, Bahrain\\ Electrical & Electronics Department, Faculty of Engineering, Lebanese University, Tripoli, LebanonFollow
Ali Elrashidi, College of Engineering, University of Business and Technology, Jeddah 21361, Saudi Arabia\\ Department of Engineering Physics, Alexandria University, Alexandria 21544, Egypt.Follow
Farah Shakra, Department of Telecommunications, Arts, Science and Technology University, Beirut, LebanonFollow

Author Country (or Countries)

Lebanon

Abstract

Circularly polarized dish parabolic antennas are highly valuable due to their superior resistance to external noise compared to linearly polarized antennas. Dish parabolic antennas equipped with end-fire helical feeds offer circular polarization, high directivity, and relatively low levels of side lobes. However, the presence of a conducting ground plane in the helical feed obstructs the reflected rays from the dish, resulting in a detrimental impact on the antenna’s directional characteristics. This research focuses on optimizing the ground plane through a series of FEKO simulations, leading to a significant reduction of side lobes and an overall enhancement of the antenna’s performance. Moreover, the introduction of knife – edge metallic scatters at specific positions and dimensions in the antenna configuration effectively decreases the sidelobe level within a range of 8 to 12 dB.

Digital Object Identifier (DOI)

https://dx.doi.org/10.18576/amis/170608

Recommended Citation

Houssein Harmouch, Ali; Elrashidi, Ali; and Shakra, Farah (2023) "Improving Directional Properties of Circularly Polarized Dish Parabolic Antennas through Knife-Edge Metallic Scatters," Applied Mathematics & Information Sciences: Vol. 17: Iss. 6, Article 14.
DOI: https://dx.doi.org/10.18576/amis/170608
Available at: https://digitalcommons.aaru.edu.jo/amis/vol17/iss6/14