View in EDS PDF Full Text

Two-Tone IMD3 and IMD5 Models of Weakly Nonlinear GaN Amplifier for Tx-Rx Microwave and Millimeter-Wave Systems.

Saved in:
Bibliographic Details
Title: Two-Tone IMD3 and IMD5 Models of Weakly Nonlinear GaN Amplifier for Tx-Rx Microwave and Millimeter-Wave Systems.
Authors: Li, Jiahao1, Wan, Fayu1, Wan, Junkun2, Gurgel, Nathan B.3, Lallechere, Sébastien4, Waldhoff, Nicolas5, Kholodnyak, Dmitry6, Fontgalland, Glauco7, Ravelo, Blaise1 blaise.ravelo@yahoo.fr
Source: Progress in Electromagnetics Research C. 2026, Vol. 168, p278-287. 10p.
Subjects: Intermodulation distortion, Microwave amplifiers, Millimeter wave communication systems, Microwave communication systems
Abstract: With the increase in users' demand, the wireless communication systems are expected to operate by considering microwave and millimeter wave signals under higher power intensity by means of multichannel propagation. Therefore, the nonlinear (NL) effect becomes a major challenge to maintain the communication system performance. To deal with such an undesirable effect, the microwave amplifier (MA) NL characterization requires a relevant modelling technique. The intermodulation distortion (IMD) constitutes one of the basic approaches for MA NL analyses. The IMD of the MA two-tone (TT) response in weakly NL behavior is modelled and measured in this paper. The modelling method is empirically derived from the Volterra series coefficients of the MA input-output characteristic from a single-tone (ST) test. The mth-order IM amplitudes of MA NL TT response are formulated as a function of the ST odd harmonics. The efficiency of the IM(m) models is experimentally validated with TT measurements of Gallium Nitride MAs around 2.4 GHz and 24 GHz carrier frequencies. The behavior of the IMD3 and IMD5 of weakly NL (WNL) models around 2.4 GHz is in good agreement with the TT input amplitude measured from -25 to -5 dBm. The IMD3 WNL model around 24 GHz is also well-correlated to measurement with input amplitude range from -20 to -3 dBm. In the future, the developed NL model can be exploited for assessing the MA impact on the microwave system communication performance. [ABSTRACT FROM AUTHOR]
Copyright of Progress in Electromagnetics Research C is the property of Electromagnetics Academy and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:With the increase in users' demand, the wireless communication systems are expected to operate by considering microwave and millimeter wave signals under higher power intensity by means of multichannel propagation. Therefore, the nonlinear (NL) effect becomes a major challenge to maintain the communication system performance. To deal with such an undesirable effect, the microwave amplifier (MA) NL characterization requires a relevant modelling technique. The intermodulation distortion (IMD) constitutes one of the basic approaches for MA NL analyses. The IMD of the MA two-tone (TT) response in weakly NL behavior is modelled and measured in this paper. The modelling method is empirically derived from the Volterra series coefficients of the MA input-output characteristic from a single-tone (ST) test. The mth-order IM amplitudes of MA NL TT response are formulated as a function of the ST odd harmonics. The efficiency of the IM(m) models is experimentally validated with TT measurements of Gallium Nitride MAs around 2.4 GHz and 24 GHz carrier frequencies. The behavior of the IMD3 and IMD5 of weakly NL (WNL) models around 2.4 GHz is in good agreement with the TT input amplitude measured from -25 to -5 dBm. The IMD3 WNL model around 24 GHz is also well-correlated to measurement with input amplitude range from -20 to -3 dBm. In the future, the developed NL model can be exploited for assessing the MA impact on the microwave system communication performance. [ABSTRACT FROM AUTHOR]
ISSN:19378718
DOI:10.2528/PIERC25122501