Multioctave Power Amplifier Design Using 9:1 Planar Impedance Transformer

Bidgoli, Hossein Asilian; Khodaei, Meghdad; Tayarani, Majid

doi:10.1109/lmwc.2020.3034389

Cited by 8 publications

(2 citation statements)

References 12 publications

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“…In absolute terms, the RLMBA achieves 47 dBm from 1.5 to 3.4 GHz, and 50% PAE from 1.4 to 3.2 GHz. To achieve similar performance over such bandwidth, PAs in literature use matching networks with at least four sections [12], [13] or complex coupled transformers [14]. The Orthogonal LMBA in [10] shows similar results on the same band, but with higher system complexity which allows extending the bandwidth at lower frequencies.…”

Section: Resultsmentioning

confidence: 97%

Output Signal Re-Injection in Load-Modulated Balanced Amplifiers for RF Bandwidth Improvement

Yuan,

Quaglia,

Chaudhry

et al. 2023

IEEE Microw. Wireless Tech. Lett.

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Section: Resultsmentioning

confidence: 97%

Output Signal Re-Injection in Load-Modulated Balanced Amplifiers for RF Bandwidth Improvement

Yuan,

Quaglia,

Chaudhry

et al. 2023

IEEE Microw. Wireless Tech. Lett.

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“…The advantages of GaN HEMT wide bandgap semiconductors such as higher breakdown voltage and power density have led to the production of power amplifiers (PAs) with high power, high bandwidth, and high efficiency 1–9 . On the other hand, GaN transistors suffer from a severe nonlinear behavior as soft saturation 10 .…”

Section: Introductionmentioning

confidence: 99%

A highly linearized second harmonic injected GaN power amplifier

Abbasnezhad

Tayarani

Abrishamifar

et al. 2022

Micro & Optical Tech Letters

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This article presents an active second harmonic injection technique for linearizing power amplifiers (PAs). In this method, a second harmonic signal with adjustable amplitude and phase, which is generated by a differential pair network, is injected into the input of a PA in a forward path. The tunable input and output matching circuits of the proposed second harmonic generator provide linearization capability in a wide frequency band. To validate the concept, the proposed second harmonic injection technique was implemented to linearize a GaN PA working around 1.5 GHz. It was shown that applying the proposed linearization method increases the output 1-dB compression point from 33.5 dBm to 39.5 dBm (about 2 dB lower than saturation power) under the CW signal. Furthermore, the backed-off efficiency at a higher adjacent channel power ratio was improved, and improvement of 16 dB at 200 MHz frequency bandwidth was achieved for an 8 MS/s 64-quadraticamplitude modulation signal.

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