BOLLI, PietroPietroBOLLIMezzadrelli, LorenzoLorenzoMezzadrelliMONARI, JADERJADERMONARIPERINI, FEDERICOFEDERICOPERINITibaldi, AlbertoAlbertoTibaldiVirone, GiuseppeGiuseppeVironeBercigli, MirkoMirkoBercigliCiorba, LorenzoLorenzoCiorbaNinni, Paola DiPaola DiNinniLABATE, Maria GraziaMaria GraziaLABATELoi, Vittorio GiuseppeVittorio GiuseppeLoiMATTANA, AndreaAndreaMATTANAPaonessa, FabioFabioPaonessaRUSTICELLI, SIMONESIMONERUSTICELLISCHIAFFINO, MARCOMARCOSCHIAFFINO2022-09-122022-09-1220202637-6431http://hdl.handle.net/20.500.12386/32563An active dual-polarized Log-Periodic antenna has been designed to meet the requirements of the low-frequency (50-350 MHz) radio telescope of the Square Kilometre Array (SKA). The integration of antenna and low noise amplifier has been conceived in order to achieve a high degree of testability. This aspect has been found to be crucial to obtain a smooth frequency response compatible with the SKA science cases. The design has also been driven by other factors such as the large-volume production (more than 130 000 antennas will be built) and the environmental conditions of the harsh Australian desert. A specific verification approach based on both wideband radiometric spectral and spatial measurements in relevant laboratory and in-situ conditions has been developed. Electromagnetic analyses and experimental results exhibit a very good agreement. In December 2019, this antenna was part of the reference solution for the System Critical Design Review of the SKA.ELETTRONICOenArticle10.1109/OJAP.2020.2999109https://ieeexplore.ieee.org/document/9107113FIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_17 Instrumentation – telescopes, detectors and techniques