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. 2017 Apr 4;17(4):764. doi: 10.3390/s17040764

Figure 11.

Figure 11

The echo signal amplitude when using the HVPA (a) without and (b) with the power MOSFET linearizer and the spectrum of the HVPA (c) without and (d) with the power MOSFET linearizer when five-cycle 20 dBm input power is applied.