A Compact Dual-Polarized 4-Port Eleven Feed with High Sensitivity for Reflectors over 0.35-1.05 GHz
Artikel i vetenskaplig tidskrift, 2015

We present significant improvements to the circular Eleven feed technology for a dual-reflector system operating over 0.35-1.05 GHz as a backup for the square kilometer array (SKA) project Band 1. In this work, the number of the feed ports is reduced to 4 from the previous 8 for dual polarization using a novel geometry at the center. The design is carried out by optimizing with a social civilization algorithm. The resulting improvements include a reflection coefficient below -12dB, an aperture efficiency above 70% at the upper end of the band, a maximum cross-polar level under -15dB, and an ohmic loss about 0.05 dB. A prototype based on this design has been manufactured and the design simulations have been verified against measurements. A simulated sensitivity of the dual-reflector receiver system for the SKA project based on the measured data is also presented in this communication.

high sensitivity

high aperture efficiency

Eleven feed technology

Författare

Jian Yang

Signaler och system, Kommunikationssystem, informationsteori och antenner, Antennsystem

Miroslav Pantaleev

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Bhushan Billade

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Marianna Ivashina

Signaler och system, Kommunikationssystem, informationsteori och antenner, Antennsystem

Tobia Carozzi

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Leif Helldner

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Magnus Dahlgren

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

IEEE Transactions on Antennas and Propagation

0018-926X (ISSN)

Vol. 63 5955-5960 7297831

Ämneskategorier

Signalbehandling

DOI

10.1109/TAP.2015.2490242