@inproceedings{10039b2a59874dc6b2769c651c318f09,
title = "Synthesis of Broadband IF and RF Impedances under Multi-sine Stimuli",
abstract = "This paper presents a novel RF load pull test setup that allows for the presentation of user specified impedances at both the RF (Radio frequency) and IF (intermediate frequency) domain, to enable the investigation of linear high efficiency power amplifier design using measurement data. The RF load pull impedances at the fundamental, and second harmonic were set to produce a derivative of a class J amplifier to emulate a high efficiency mode of operation. The IF impedance up to the fifth IF product was then varied to quantify its effect on linearity. To enable this investigation a multi-sine stimuli was synthesized using multiple signal sources all phase locked to reference local oscillator. It was found that a greater than 10dB improvement in linearity was achieved by actively injecting a signal at IF that can be applied in an envelope tracking system.",
keywords = "Emulation, harmonic loadpull, phase coherence, power amplifiers, static impedance",
author = "Chaudhary, \{Muhammad Akmal\}",
note = "Publisher Copyright: {\textcopyright} 2018 IEEE.; 4th International Conference on Devices, Circuits and Systems, ICDCS 2018 ; Conference date: 16-03-2018 Through 17-03-2018",
year = "2019",
month = jan,
day = "7",
doi = "10.1109/ICDCSyst.2018.8605140",
language = "English",
series = "Proceedings of the 4th International Conference on Devices, Circuits and Systems, ICDCS 2018",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "91--94",
booktitle = "Proceedings of the 4th International Conference on Devices, Circuits and Systems, ICDCS 2018",
address = "United States",
}