SWITCHED-BEAM ARRAY ANTENNA AT 28 GHZ FOR 5G WIRELESS SYSTEM BASED ON BUTLER MATRIX BEAMFORMING NETWORK. NIJOTECH [Internet]. 2019 Mar. 27 [cited 2026 Apr. 30];38(2):484-9. Available from: https://nijotech.com/index.php/nijotech/article/view/1994