30–512 <scp>MHz</scp> power amplifier design using <scp>G</scp>a<scp>N</scp> transistor

Pisa, Stefano; Chicarella, Simone; Cusani, Roberto; Citrolo, J.

doi:10.1002/mop.31155

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…The Gallium Nitride (GaN) technology shows attractive features due to its high breakdown voltage, high temperature stability, and high power density [21,22]. Moreover, the swing of a GaN device output voltage is mostly limited by its ohmic region rather than its gate-drain breakdown.…”

Section: Active Device Technologymentioning

confidence: 99%

S Band Hybrid Power Amplifier in GaN Technology with Input/Output Multi Harmonic Tuned Terminations

2021

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In this paper, the design, fabrication, and measurements of an S band multi harmonic tuned power amplifier in GaN technology is described. The amplifier has been designed by exploiting second and third harmonic tuning conditions at both input and output ports of the active device. The amplifier has been realized in a hybrid form, and characterized in terms of small and large signal performance. An operating bandwidth of 300 MHz around 3.55 GHz, with 42.3 dBm output power, 9.3 dB power gain and 53.5% power added efficiency PAE (60% drain efficiency) at 3.7 GHz are measured.

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Section: Active Device Technologymentioning

confidence: 99%

S Band Hybrid Power Amplifier in GaN Technology with Input/Output Multi Harmonic Tuned Terminations

2021

Self Cite

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“…Therefore, the upcoming RF transmitter architecture must offer wide bandwidth with operating range, even extending to multi-octave frequencies. In addition, the tactical radios operating in VHF/UHF band also require multi-octave RF transmitters [2]- [5]. The key problem in such multi-octave transmitters is to handle harmonics generated within the band of operation.…”

Section: Introductionmentioning

confidence: 99%

Digitally Assisted Harmonic Cancellation for Multi-Octave Filter-Less Transmitter

Singhal

Rawat

2020

IEEE Access

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This paper presents and demonstrates the design of a filter-less transmitter architecture with digitally assisted harmonic cancellation. A neural network is used to model the harmonics as well as IMD for digital predistortion applications. This neural network-based harmonic modeling does not require any reference signal to be injected at the input of PA, thereby reducing the complexity in characterizing the harmonics. An in-house 10 W PA operating from VHF to L-band has been designed and characterized for its harmonic suppression. This PA is used along with agile RF transceiver AD9361 from Analog Device and Xilinx embedding platform using Zynq ZC-706 system-on-chip for implementing the entire transmitter. The receiver of AD9361 captures the nonlinearity of the PA in terms of harmonics as well as intermodulation distortion (IMD) components for modeling and predistortion. The proposed architecture can handle all types of distortions due to hardware as well as PA nonlinearity. Besides, it is also able to cancel the harmonics using a harmonic injection in the feed-forward configuration. This transmitter architecture has the advantages of being low cost, filter-less, wideband, frequency agile, reconfigurable and less bulky compared to the conventional scheme. The proposed scheme is demonstrated to transmit 5 MHz LTE signal at different frequencies over the range of 100 MHz to 400 MHz. In such a case, the second and third harmonics appear over the frequency range from 200 MHz to 1.2 GHz, which are within the amplification range of PA, yet they are suppressed without using any filter at the output. More than −40 dBc harmonic rejection is achieved over the entire operating range of this filter-less transmitter. The adjacent channel leakage ratio (ACLR) is always better than −45 dBc after applying digital predistortion.

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Increase the bandwidth of the power amplifier to 185% of the bandwidth by ferrite transformers

Muhamed

Abboud

Alhariri

2021

International Journal of Electronics Letters

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30–512 MHz power amplifier design using GaN transistor

Cited by 5 publications

References 12 publications

S Band Hybrid Power Amplifier in GaN Technology with Input/Output Multi Harmonic Tuned Terminations

S Band Hybrid Power Amplifier in GaN Technology with Input/Output Multi Harmonic Tuned Terminations

Digitally Assisted Harmonic Cancellation for Multi-Octave Filter-Less Transmitter

Increase the bandwidth of the power amplifier to 185% of the bandwidth by ferrite transformers

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