Power amplifier linearization using feedforward technique for wide band communication system

Honarvar, Mohammad; Moghaddasi, M.N.; Eskandari, Ahmad Reza

doi:10.1109/rfit.2009.5383686

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…In the recent years, many studies have been focused on the improvement of novel solutions, allowing mainly for performance development, broadband operation, and miniaturization of coupled-lines couplers. Typically, the coupled-line couplers are designed and manufactured in microstrip or stripline technology [11][12][13][14][15][16][17][18]. The stripline is non-dispersive, and has no cutoff frequency.…”

Section: Introductionmentioning

confidence: 99%

Wideband stripline compact directional coupler with lumped-element compensating filter

Vafaeenejad¹,

Eskandari²

2021

J. Inst.

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This paper presents a design and fabrication of a wideband high power stripline directional coupler. The coupler has 50 dB coupling in the frequency range of 30 to 520 MHz. The design method consists of two steps. At the first step, a stripline coupler is designed by combination two directional coupler and connecting the through ports to each other. Then miniaturizing technique is used to compact the dimensions. At the second step, two lumped-element filter compensating circuits are used in series with the coupling and isolating ports of the coupler to flatten the overall coupling response of the coupler over multioctave frequency bands. This coupler is fabricated on Rogers 4003 substrate with dielectric constant of 3.55. The dimensions of the coupler are 25 × 28 mm 2 which are very compact considering its operation frequency. The measurements have a good agreement with predicted results which is verifies the feasibility of the directional coupler.

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Section: Introductionmentioning

confidence: 99%

Wideband stripline compact directional coupler with lumped-element compensating filter

Vafaeenejad¹,

Eskandari²

2021

J. Inst.

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“…A new technique explored with a combination of feed forward and predistortion method results with better linearity [4]. Linear and wide band characteristics by feed forward linearization technique achieved, where the circuitry is complex with an auxiliary error amplifier and passive control circuits [5]. The author discusses the Modified quasi memory less nonlinear Saleh model for implementation of power amplifier which is done using Simulink [6].…”

Section: Introductionmentioning

confidence: 99%

Design of 2.4 Ghz Mmic Feed Forward Amplifier for Wireless Applications

Shanthi¹,

Js²

2019

JMICRO

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This paper proposes a design of 0.15μm Monolithic Microwave Integrated Circuit (MMIC) power amplifier using GaAs pHEMT technology at 2.4 GHz which employs feed forward linearization technique to improve linearity. The amplifier is designed to operate in personal communication systems (PCS) frequency range using WIN semiconductor GaAs pHEMT technology. Single stage power amplifier is designed in lumped and distributed components with its layout. Linearity of PA is improved by Feed forward Linearization technique. To evaluate the performance of proposed linearized amplifier, Advanced Design system (ADS) tool is used. The designed circuit results with 13.65dBm output power at 1dB compression point (P1dB), 6dB power gain and maximum Power added efficiency of 16.4%. Linearity achieved by feed forward linearizer circuit with third order intermodulation suppression of 30dBc for the output power level of 8.217dBm and 1dB compression point at an input power of 15 dBm whereas 6 dBm for the Power amplifier without feed forward linearizer circuit. The designed Power amplifier system with feed forward linearizer had IMD3 suppression of 30dBc which is in appreciable range with improvement in 1dB compression point.

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Power Amplifier Linearization using Hybrid Optimization Techniques

Davis

Krishnan

2020

2020 International Conference on Communication and Signal Processing (ICCSP)

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Power amplifier linearization using feedforward technique for wide band communication system

Cited by 4 publications

References 4 publications

Wideband stripline compact directional coupler with lumped-element compensating filter

Wideband stripline compact directional coupler with lumped-element compensating filter

Design of 2.4 Ghz Mmic Feed Forward Amplifier for Wireless Applications

Power Amplifier Linearization using Hybrid Optimization Techniques

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