Design of High Gain and Broadband Antennas at 60 GHz for Underground Communications Systems

Table 1

Optimized parameters for antenna 1, antenna 2, antenna 3, and antenna 4.

Parameters	Antenna 1	Antenna 2	Antenna 3	Antenna 4
𝑅𝑑 (mm)	1.50	1.50	1.50	1.50
𝑃 (mm)	0.8	0.175	0.2	0.2
𝐿𝑠 (mm)	1.2	1.5	1.5	1.65
𝑊𝑠 (mm)	0.2	0.2	0.2	0.2