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. Author manuscript; available in PMC: 2016 Apr 27.
Published in final edited form as: Magn Reson Med. 2012 Aug 13;70(1):276–289. doi: 10.1002/mrm.24462

Figure 3.

Figure 3

Peak power and current measurement using an impedance transformer connected to the CMCD output that loads amplifier with approximately 7 Ω when a 50 Ω load is connected to the secondary winding and drain voltage is changed manually across the expected operating range (a). Inter-element isolation of two non-overlapping coils vs. drain voltage provided by the amplifier’s output impedance. Isolation varies with voltage due to the voltage-modulated drain-source capacitance Cds of the power MOSFET (b). Effect of this modulation on the phase of the RF carrier (c).