Large-Signal Characterization of an 870MHz Inverse Class-F CrossCoupled Push-Pull PA using Active Mixed-Mode Load-Pull

Heijden, Mark P. van der; Hartskeerl, D.M.H.; Volokhine, I.; Teppati, Valeria; Ferrero, A.

doi:10.1109/rfic.2006.1651173

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…Therefore, if the other branch is not driven 180 out of phase, and loaded with the same impedance, the symmetry is lost and hence, the measured even mode impedance is incorrect. The common mode load-pull can also be done by using an active loop and 180 hybrids, as in [7]. However, we are interested in having individual control of the two output branches, and any phase imbalance in the 180 hybrids could affect the measurement results.…”

Section: Methodsmentioning

confidence: 99%

Investigation of Push-Pull Microwave Power Amplifiers Using an Advanced Measurement Setup

Saad

Thorsell

Andersson

et al. 2013

IEEE Microw. Wireless Compon. Lett.

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In this letter, we investigate the influence of the output balun for realization of wideband and efficient microwave pushpull power amplifiers (PAs). For this, a push-pull GaN-HEMT PA operating between 1-3 GHz without an output balun has been implemented and a novel push-pull harmonic load-pull measurement setup that allows arbitrary balanced fundamental and second harmonic loads to be presented to the push-pull PA is proposed. The measurement results illustrate that the efficiency may be degraded up to 25% if improper common mode harmonic impedances are presented by the balun. The proposed approach allows the PA and balun to be investigated separately and is therefore expected to be an important tool for further research on balun and PA structures suitable for high efficiency and wideband push-pull applications at microwave frequencies.Index Terms-Broadband, GaN-HEMT, high efficiency, power amplifier (PA), push-pull.

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Section: Methodsmentioning

confidence: 99%

Investigation of Push-Pull Microwave Power Amplifiers Using an Advanced Measurement Setup

Saad

Thorsell

Andersson

et al. 2013

IEEE Microw. Wireless Compon. Lett.

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“…Since development teams may wish to focus on the basic technology, this load-pull almost exclusively uses simple single stage load-pull structures [8]. While active mixed-mode load-pull is possible [3], it is more appropriate closer to the circuit level. A technique that helps bridge the gap between the basic technology load-pull performance and the performance in the circuit application would greatly aid in technology and design decisions.…”

Section: Introductionmentioning

confidence: 99%

Mixed-Mode Active Load-Pull Using one Single-Ended Device-Under-Test

Buisman

Perez-Cisneros

Hallberg

et al. 2021

2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR)

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A method to emulate differential transmitter architectures is presented. The technique, which is based on mixedmode active load-pull measurements, predicts power amplifier (PA) performance while avoiding the need to manufacture the complete PA. The method is based on an iterative procedure using transistor/branch PA active load-pull measurements together with the S-parameters of the load network. Advantageously, real world performance of the complete differential PA can be evaluated in the design stage. Thereby, many different output combiners and configurations, e.g., biases, transistors, and branch phases, can be fully evaluated without fabrication. Compared to prior art, the method requires only a single representative deviceunder-test, while providing flexibility in the input signal and the target load network. Thus, a novel powerful measurement tool for PA designers is presented. The technique is demonstrated by performing mixed-mode load-pull and emulating a differential amplifier at 2.14 GHz using continuous wave signals.

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“…For technology development, load-pulling of simple single stage arrays of unit-cells [8] is a key tool for assessing device performance. While active mixed-mode load-pull is possible [3], it is more appropriate closer to the circuit level. A technique that can use device performance data to understand the performance in circuit applications allows for better technology trade-offs to be made.…”

Section: Introductionmentioning

confidence: 99%

Emulation of a Multi-Stage Differential Amplifier Using one Single-Ended Device-Under-Test

Buisman

Perez-Cisneros

Hallberg

et al. 2021

2021 96th ARFTG Microwave Measurement Conference (ARFTG)

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A method to emulate multi-stage power amplifier (PA) architectures is presented. The technique predicts multistage PA performance. The method is based on an iterative procedure using transistor/branch PA active load-pull measurements to include inter-stage interaction. As a benefit, realworld performance of a multi-stage PA can be evaluated early in the design process. Compared to previous published work, the method requires only a single representative device-undertest to embody multi-stage architectures. Thus, a compelling measurement method for PA designers is presented. The method is demonstrated by emulating a two-stage differential amplifier at 2.14 GHz using single-tone signals.

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Large-Signal Characterization of an 870MHz Inverse Class-F CrossCoupled Push-Pull PA using Active Mixed-Mode Load-Pull

Cited by 6 publications

References 14 publications

Investigation of Push-Pull Microwave Power Amplifiers Using an Advanced Measurement Setup

Investigation of Push-Pull Microwave Power Amplifiers Using an Advanced Measurement Setup

Mixed-Mode Active Load-Pull Using one Single-Ended Device-Under-Test

Emulation of a Multi-Stage Differential Amplifier Using one Single-Ended Device-Under-Test

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