@article{CTT100917306,
  author = {Qi Li and Jiro Hirokawa and Takashi Tomura and Nelson J. G. Fonseca},
  title = {Two-Dimensional One-Body 3 × 3-Way Hollow-Waveguide Nolen Matrix Using a Two-Plane Unequal Division Coupler,},
  journal = {IEEE Trans. Microw. Theory Tech.},
  year = 2024,
}

@inproceedings{CTT100917322,
  author = {Jiro Hirokawa and Qi Li and Takashi Tomura and Nelson J. G. Fonseca},
  title = {Recent Advances on Two-dimensional Orthogonal Switching Matrices with an Arbitrary Number of Beam},
  booktitle = {},
  year = 2024,
}