Power amplifiers, Electric distortion, Modulation (Electronics) -- Mathematical models, Dual-band transmission
A significant development of recent research in nonlinear distortion is the expansion of the conventional two-tone test for power amplifiers to the concurrent dual-band transmitters, by Amin et al. A general framework using dual two-tones is developed, which shows that the output signal is affected not only by intermodulation (IM) products but also by cross-modulation (CM) products. In this paper, we will make a number of clarifications to Amin et al.'s paper. The effects of IM and CM in passband will be discussed, IM represents a reduction for compressive devices, and CM reflects an interference caused by the signal from the other band, and followed by the analysis of out-of-band IM. It was concluded that out-of-band IM needs to be taken into consideration for the design of power amplifiers when two bands are very close.
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Yan, Siyuan; Yang, Xianzhen; Li, Xiao; and Li, Fu, "On Dual-Band Amplifications Using Dual Two-Tones: Clarifications and Discussion" (2017). Electrical and Computer Engineering Faculty Publications and Presentations. 426.