Y. N. Wijayanto, H. Murata, and Y. Okamura, “Optical Modulator Using Channel Optical Waveguides and Planar Patch-Antennas with Gaps”, Jurnal Elektronika dan Telekomunikasi, vol. 15, no. 2, pp. 50–54, Jun. 2016, doi: 10.14203/jet.v15.50-54.