Open access
Oct 2026
Eight-beam wide coverage ridge waveguide slot antenna array based on 4×4 Butler matrix
Multibeam antennas fed by Butler matrices (BMs) can effectively combine passive beamforming networks with antenna arrays. However, limited structural approaches exist for BM-integrated antennas to address the issues associated with scan loss and null regions. This paper presents a ridged waveguide slot antenna arra...
Soyeon Jo, Ka-Hyeon Lee, Su-Jeong Yun et al.
· Scientific Reports · 0 citations