Zulfi, Z., J. Suryana, and A. Munir. “A Decoupling Technique for Beamforming Antenna Arrays Using Simple Guard Trace Structures”. Journal of ICT Research and Applications, vol. 17, no. 3, Dec. 2023, pp. 356-72, doi:10.5614/itbj.ict.res.appl.2023.17.3.5.