Title :
Delopement of mutimode horns and wideband feed for radio telescopes
Author :
Ujihara, H. ; Kimura, K. ; Matsumoto, K. ; Ogawa, H. ; Ohno, T. ; Tsuboi, M. ; Kasuga, T. ; Homma, M. ; Kawaguchi, N.
Author_Institution :
Kashima Space Res. Center, Nat. Instiutute of Infomation & Commun. Technol., Kashima, Japan
Abstract :
Multimode horns were developed for 8.4GHz, 22GHz, 43GHz receiver systems of ASTRO-G/VSOP-2 satellite for Space-VLBI, and for 6.7GHz of VERA 20m radio telescopes of National Astronomical Observatory in JAPAN and 25m Shanghai Radio telescope in China. Rational bandwidth of these horns in low cross polar level are 20-30%, and their thin walls without corrugation and shortened length are the best for the satellite use. Also, wideband feeds will be presented, which are now developing for SKA and VLBI2010, which is a kind of Tapered Slot Antenna or other of traveling wave antenna.
Keywords :
broadband antennas; horn antennas; radiotelescopes; slot antennas; ASTRO-G/VSOP-2 satellite; China; JAPAN; National Astronomical Observatory; SKA; Shanghai Radio telescope; Space-VLBI; VERA radio telescope; VLBI 2010; frequency 22 GHz; frequency 43 GHz; frequency 6.7 GHz; frequency 8.4 GHz; low cross polar level; mutimode horn; radio telescopes; receiver system; tapered slot antenna; thin wall; traveling wave antenna; wideband feed; Feeds; Radio astronomy; Satellite broadcasting; Satellites; Slot antennas; Structural beams; Wideband;
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
DOI :
10.1109/URSIGASS.2011.6051293
