Media type: E-Article Title: Compact 2-D Multibeam Array Antenna Fed by Planar Cascaded Butler Matrix for Millimeter-Wave Communication Contributor: Wang, Xiaozhou; Fang, Xiao; Laabs, Martin; Plettemeier, Dirk imprint: Institute of Electrical and Electronics Engineers (IEEE), 2019 Published in: IEEE Antennas and Wireless Propagation Letters Language: Not determined DOI: 10.1109/lawp.2019.2937254 ISSN: 1536-1225; 1548-5757 Origination: Footnote: