Title :
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
fDate :
7/6/1905 12:00:00 AM
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;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2347998
