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W3018200430 abstract "Active Load-Pull (L-P) measurements using modulated signals are performed on a packaged GaN HEMT to optimize power and linearity. The measurements are taken using single-tone (1-tone), two-tone (2-tone), and modulated (128-QAM) signals at 2 GHz. A test fixture with a 6 W commercial GaN HEMT is used as the device-under-test (DUT). Linearity is optimized by minimizing IM3 and ACPR. Furthermore, a comparison of the optimized load power (P L ) performance between 1-tone and 128-QAM is made. Our results show that the impedance matching conditions that optimize either power or linearity can be reliably predicted via active L-P using modulated signals. We also find that there are considerable differences between 1-tone and the modulated signals in the P L contours and optimal P L impedance matching conditions. These ascertainments could impact power amplifier design depending on the power and linearity specification trade-offs." @default.
W3018200430 created "2020-05-01" @default.
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W3018200430 date "2020-01-01" @default.
W3018200430 modified "2023-09-26" @default.
W3018200430 title "Using Active Load-Pull with Modulated Signals to Optimize Power and Linearity" @default.
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W3018200430 doi "https://doi.org/10.1109/arftg47584.2020.9071645" @default.
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