Helical Feed Manipulation for Parabolic Reflector Antenna Gain Control
Zohair Mohammed Elhassan Hussein1, Abdelrasoul jabar kizar alzubaidi2
1Zohair Mohammed Elhassan Hussein, College of Engineering and Architecture, Bahri University, Sudan.
2Abdelrasoul Jabar Kizar Alzubaidi, Sudan University of Science and Technology, College of Engineering, School of Electronic Engineering, Sudan.
Manuscript received on November 14, 2014. | Revised Manuscript received on November 28, 2014. | Manuscript published on December 30, 2014. | PP: 66-68  | Volume-4 Issue-2, December 2014. | Retrieval Number:  B3581124214/2013©BEIESP

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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Helical antennas have long been popular in applications from VHF to microwaves requiring circular polarization, since they have the unique property of naturally providing circularly polarized radiation. One area that takes advantage of this property is satellite communications. Where more gain is required than can be provided by a helical antenna alone, a helical antenna can also be used as a feed for a parabolic dish for higher gains. The helical antenna can be an excellent feed for a dish, with the advantage of circular polarization. One limitation is that the usefulness of the circular polarization is limited since it cannot be easily reversed to the other sense, left- handed to right-handed or vice-versa. This paper deals with applying an electronic technique to control the helical feed of the parabolic reflector feed. The control of the helical feed leads to the control of the antenna gain .The proposed design is based on implementing a microcontroller connected to an interface to control stepper motor.
Keywords: Helical Antenna, Parabolic Dish feed, Parabolic helical feed reflector, Antenna, Antenna gain, microcontroller, Interface, Stepper motor.