Circularly Polarized S-Band Satellite Antenna With Parasitic Elements and Its Arrays

Author

Eun-cheol Choi ; Lee, Jae W. ; Taek-Kyung Lee ; Woo-Kyung Lee

Author_Institution

Sch. of Electron., Telecommun. & Comput. Eng., Korea Aerosp. Univ., Goyang, South Korea

Volume

13

fYear

2014

fDate

7/6/1905 12:00:00 AM

Firstpage

1689

Lastpage

1692

Abstract

A structural modification of S-band turnstile antenna with cylindrical parasitic elements around a main radiator is introduced and investigated with respect to its gain, axial-ratio (AR) beamwidth, and radiation pattern. The overall structure is composed of a main radiator of two crossed bowtie-shaped dipole antennas and a feeding network using a Wilkinson power divider with phase differences between two parts. A final optimization of the parameter values for the enhancement of AR beamwidth is carried out from the parametric studies. The proposed antenna has not only a broad 5-dB AR bandwidth of 12.3% ranging from 2025 to 2290 MHz, but also a stable peak gain of 7.6 dBic with circular polarization (CP) characteristic.

Keywords

antenna radiation patterns; bow-tie antennas; dipole antennas; satellite antennas; AR beamwidth; S-band turnstile antenna; Wilkinson power divider; antenna radiation pattern; axial-ratio beamwidth; bowtie shaped dipole antennas; circularly polarized S-band satellite antenna; cylindrical parasitic elements; feeding network; parasitic elements; phase differences; structural modification; Antenna arrays; Antenna radiation patterns; Bandwidth; Dipole antennas; Power dividers; Satellite antennas; Satellites; Circular polarization (CP); parasitic element; telemetry, tracking, and command (TT&C); turnstile antenna;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2014.2347998

Filename

6879248