Title :
New topology ultrawideband antenna for VLBI2010
Author :
Munoz, L.E.G. ; Lavado, A.R. ; Aller, M.M. ; Puente, J.M.S. ; Fernandez, J.A.L. ; Vargas, D.S.
Author_Institution :
Dept. de Teor. de la Senal y Comun., Univ. Carlos III de Madrid, Leganes, Spain
Abstract :
Two new topology that potentially can open new solutions for covering the new VLBI2010 configuration and its frequency bands associated are presented in this manuscript. In the first approach three bands are covered: 2.2 - 2.7 GHz, 7 - 9 GHz and 28 - 33 GHz. This new topology is based on an archimedean spiral on the top of two frequency selective surfaces (FSS´s) and a ground plane. The architecture of the FSS´s and their height to the antenna are optimized for covering the complete sub-bands. Second approach consider a single band from 2 to 14 GHz. A log-spiral printed on a semi-conic surface is place over a PEC ground plane. Whole structure is adjusted in order to obtain a pure circular polarization at broadside direction.
Keywords :
UHF antennas; antenna feeds; antenna radiation patterns; frequency selective surfaces; microstrip antennas; microwave antennas; polarisation; radiotelescopes; spiral antennas; FSS; PEC ground plane; VLBI2010 configuration; archimedean spiral antenna; bandwidth 2.2 GHz to 2.7 GHz; bandwidth 28 GHz to 33 GHz; bandwidth 7 GHz to 9 GHz; broad bandwidth feeds; circular polarization; frequency bands; frequency selective surfaces; geodetic radiotelescopes; ground plane; log-spiral antenna; semi-conic surface; topology ultrawideband antenna; ultrawideband antenna; Frequency selective surfaces; Spirals; FSS; Ultrawideband antenna (UWB); spiral antenna;
Conference_Titel :
Antennas and Propagation (EuCAP), 2013 7th European Conference on
Conference_Location :
Gothenburg
Print_ISBN :
978-1-4673-2187-7
Electronic_ISBN :
978-88-907018-1-8
