Sigmoid profiled septum: Evaluation of the parabolic reflector with the septum feed horn

Author

Ilkyu Kim ; Kovitz, Joshua M. ; Rahmat-Samii, Yahya

Author_Institution

Electr. Eng. Dept., Univ. of California, Los Angeles, Los Angeles, CA, USA

fYear

2013

fDate

7-13 July 2013

Firstpage

236

Lastpage

237

Abstract

A sigmoid function is used to define a smooth profile for possible use in septum designs. In addition, Particle Swarm Optimization (PSO) is used to optimize the sigmoid-profiled septum polarizer. PSO is applied to a sigmoid septum as well as a stepped septum, and the performance of both designs is further compared. Both septum designs are selected to be optimized for a 25% bandwidth, and the impedance matching and axial ratio is analyzed. Furthermore, the reflector antenna system is investigated utilizing the optimized septum horns as a feed for a 15λ parabolic reflector antenna. A directivity of approximately 32 dB is attained for both parabolic reflector antenna systems.

Keywords

antenna feeds; horn antennas; impedance matching; particle swarm optimisation; reflector antennas; 15λ parabolic reflector antenna system; PSO; axial ratio; impedance matching; parabolic reflector antenna evaluation; particle swarm optimization; septum feed horn antenna; sigmoid function; sigmoid-profiled septum polarizer design; stepped septum; Antenna feeds; Antenna radiation patterns; Bandwidth; Horn antennas; Particle swarm optimization; Reflector antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE

Conference_Location

Orlando, FL

ISSN

1522-3965

Print_ISBN

978-1-4673-5315-1

Type

conf

DOI

10.1109/APS.2013.6710779

Filename

6710779