Figure of Merrit Range: 32.3 to 55.7 DUT 11 DUT 23 DUT 9 DUT 22 DUT 2 DUT 4 DUT 5 DUT 25 DUT 18 DUT 26 DUT 10 DUT 14 DUT 3 DUT 8 DUT 17 DUT 13 DUT 21 DUT 27 DUT 24 DUT 28 DUT 12 DUT 1 DUT 29 DUT 20 DUT 6 DUT 16 DUT 15 DUT 19 Dut 7 0102030405060 FIG 8 Experiment 1 FOM range. Standby Power Range 22mW to 1.6W UUT 12 UUT 7 UUT 1 UUT 24 UUT 23 UUT 3 0.000 0.500 1.0001.500 Power (W) FIG 9 Experiment 1 standby power range. 2.000 - Table 2. Experiment 1b, sample test with multiple receivers. Rank by Test Receiver Tx ID UUT 1 4) Quiescent power, or UUT 2 UUT 3 UUT 4 UUT 5 UUT 6 UUT 7 UUT 8 UUT 9 transmitter power-dissipation when no receiver is present, is measured per ANSI/ CTA-2042.3 and recorded. 5) Reporting the result is done by averaging all active power measurements into a single " Figure of Merit " (FOM). The FOM is compared to other transmitters in the power class to establish a ranking. The wireless power transmitter with the highest score got the " Number 1 " ranking. Random receiver placement seen in real-world use makes it impossible for a consumer to replicate the reported FOM. Therefore, this protocol reports a ranking and not a statement of real-world efficiency performance. Biggest delta from mean 3.5 The Big Assumption The integrity of this test protocol hinges on the assumption that a single reference receiver may be used in the test setup for each class of wireless power transmitter. To test this assumption, the WPC conducted two experiments. Experiment 1: Using a third-party laboratory familiar with DOE/EPA testing of consumer products, 29 different September 2022 z IEEE POWER ELECTRONICS MAGAZINE 61 1.25 -1.5 -1.5 Rx1 Rx2 Rx3 Rx4 Mean 2 1 3 2 4 5 6 8 9 7 1 4 2 8 3 5 7 9 6 3 1 9 4 6 5 8 7 1 2 3 9 5 4 6 8 7 1.25 3 2 7.5 4.25 5.25 6.5 8.5 6.75