Journal ArticleDOI
Transfer characteristic of IM/sub 3/ relative phase for a GaAs FET amplifier
TLDR
In this paper, the transfer characteristic of relative phase of the third-order intermodulation distortion (IM/sub 3/) of a GaAs FET amplifier is measured and analyzed.Abstract:
The transfer characteristic of relative phase of the third-order intermodulation distortion (IM/sub 3/) of a GaAs FET amplifier is measured and analyzed. The measurement system and method are also described. For drives in the weakly nonlinear region, the measured relative phase of IM/sub 3/ is equal to that of the carrier and is in agreement with the analysis results using Volterra-series representation. For drives in the saturation region, the measured relative phase of IM/sub 3/ versus the input power moves drastically compared with that of the carrier and is in agreement with numerical analysis using discrete Fourier transform. Comparison between measured and analytical results shows the drastic move of IM/sub 3/ relative phase is caused by the generation of IM/sub 3/ due to AM-PM conversion. The measured results and the measurement method are useful for the design and adjustment of predistortion-type linearizers for GaAs FET high-power amplifiers.read more
Citations
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Journal ArticleDOI
Behavioral modeling of nonlinear RF power amplifiers considering memory effects
Hyunchul Ku,J.S. Kenney +1 more
TL;DR: In this article, the authors proposed a behavioral model to treat memory effects in nonlinear power amplifiers (PAs) by augmenting the memory polynomial model with a sparse delay tap structure that reduces the parameter space required for accurate model identification.
Journal ArticleDOI
Analog predistortion linearizer for high-power RF amplifiers
TL;DR: In this article, an analog predistortion linearizer for a high-power amplifier of a code-division multiple access (CDMA) base station was developed, which can cancel the third and fifth intermodulation distortions independently.
Proceedings ArticleDOI
Analog predistortion linearizer for high power rf amplifier
TL;DR: In this paper, an analog pre-distortion linearizer for the high power amplifier of CDMA base station was developed to suppress the spectral regrowth in the adjacent channel effectively, the odd order intermodulation distortions should be cancelled.
Proceedings ArticleDOI
Phase detrending for measured multisine signals
TL;DR: A method to detrend the phases of measured multisine signals is developed that finds a time reference that removes the linear component of the measured phases and aligns them, within a precision specified by the user, to their expected values.
Journal ArticleDOI
Measurement of two-tone transfer characteristics of high-power amplifiers
TL;DR: In this article, the amplitude and phase data of the two-tone fundamental, third-order intermodulation, and fifth-order Intermodulation components versus input power level were measured.
References
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Novel linearizer using balanced circulators and its application to multilevel digital radio systems
N. Imai,T. Nojima,T. Murase +2 more
TL;DR: In this article, a miniaturized RF predistortion linearizer for a GaAs field effect transistor power amplifier applicable to 256 quadrature-amplitude modulation (QAM) digital microwave systems is presented.
Journal ArticleDOI
Third-Order Intermodulation Distortion and Gain Compression in GaAs Fet's
TL;DR: In this paper, a simple unilateral nonlinear circuit model of a GaAs FET is used in the analysis of the third-order intermodulation distortion and gain compression characteristics of a single-stage amplifier.
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