Development and Application of Wireless Power Transmission Systems for Wireless ECG Sensors

Table 1

Power transmission efficiency.

Distance (mm)	Vp (V)	VR_Tx (V)	Is (A)	Ps (W)	PL (W)	Power efficiency (%)
5	7.3	1.46	0.146	0.73	0.026645	3.65
10	6.7	1.48	0.148	0.74	0.022445	3.033108108
15	5.9	1.52	0.152	0.76	0.017405	2.290131579
20	4.8	1.56	0.156	0.78	0.01152	1.476923077
25	3.28	1.6	0.16	0.8	0.005379	0.6724
30	2.8	1.62	0.162	0.81	0.00392	0.483950617
35	2.3	1.62	0.162	0.81	0.002645	0.32654321
40	1.84	1.6	0.16	0.8	0.001693	0.2116
45	0.82	1.62	0.162	0.81	0.000336	0.041506173
50	0.85	1.62	0.162	0.81	0.000361	0.044598765