Active antenna system enhancement for supporting Licensed Shared Access (LSA) concept. - Seppo Yrjölä; Eero Heikkinen (CrownCom, 2014)

Dual-polarized 2×2 element sub-array at 15 GHz with high port isolation. - Marko Sonkki; Sami Myllymäki; Jussi Putaala; Maciej Sobocinski; Aarno Pärssinen; Eero Heikkinen; Tomi Haapala; Kari Nikkanen (EuCNC, 2017)