Novel Compact Design and Investigation of a Super Wideband Millimeter Wave Antenna for Body-Centric Communications

Table 6

Gain and efficiency comparison.

Distances		Free space	0 mm	2 mm	4 mm	6 mm	8 mm
Frequency (GHz)
Radiation efficiency (%)	60	70.65	4.966	56	62.12	65.91	68.6
	80	63.96	4.94	47.49	53.55	58.52	60.44
	100	57.31	4.404	41.28	49.61	52.75	53.8
Total efficiency (%)	60	70.28	4.953	55.97	62.08	65.85	68.51
	80	63.74	4.924	47.37	53.25	58.38	60.28
	100	55.89	4.401	40.21	48.71	51.67	52.63
Gain (dB)	60	4.669	−6.368	6.071	5.394	5.463	5.407
	80	4.125	−4.665	5.413	4.688	4.253	4.018
	100	5.779	−6.524	6.853	7.007	6.852	6.511