Comparative Analysis of a Super-Wideband Millimeter Wave Array Antenna for Body-Centric Communications

Table 10

Array 4 on-body results at different gap distances.

Parameters at 60 GHz	Free-space	On-body 2 mm	On-body 4 mm	On-body 6 mm	On-body 8 mm	On-body 10 mm
Return loss (dB)	−28.015	−27.771	−33.152	−38.623	−27.701	−28.568
VSWR	1.082	1.085	1.044	1.023	1.085	1.077
Gain (dBi)	6.195	5.960	6.665	6.395	6.411	6.140
Radiation efficiency (%)	33.61	24.76	26.86	27.87	28.50	29.90
Total efficiency (%)	33.56	24.72	26.85	27.87	28.45	29.86