Efficient Programmable Pulse Shaping for X -Band GaN MMIC Radar Power Amplifiers

Corrado  Florian; Tommaso Cappello; Daniel Niessen; Rudi Paolo Paganelli; Scott Schafer; Zoya Popović

doi:10.1109/TMTT.2016.2631171

Efficient Programmable Pulse Shaping for X -Band GaN MMIC Radar Power Amplifiers

Corrado Florian, Tommaso Cappello, Daniel Niessen, Rudi Paolo Paganelli, Scott Schafer, Zoya Popović

Department of Electrical & Electronic Engineering

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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Abstract

This paper presents a supply modulated X-band 12-W peak power transmitter that maintains an average efficiency greater than 50% for various shapes of amplitude-modulated pulses. The main power amplifier is a two-stage GaN-on-SiC MMIC with a peak efficiency of 65%, while the pulse envelope modulator is a 95% efficient hybrid 3-b power DAC implemented with GaN-on-Si transistor switches. Envelope shaping of a pulsed waveform results in improved spectral confinement of greater than 15 dB for the first sideband compared with constant-envelope pulses, with over 20 points improvement in total efficiency. The combination of supply modulation and digital predistortion is shown to result in high composite (total) efficiency of over 55%, with simultaneous high dynamic range and with flexible digitally programmable pulse shaping.

Original language	English
Pages (from-to)	881-891
Number of pages	11
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	65
Issue number	3
Early online date	16 Dec 2016
DOIs	https://doi.org/10.1109/TMTT.2016.2631171
Publication status	Published - 1 Mar 2017

Bibliographical note

Acceptance date is provisional and based on date of publication.

Keywords

envelope tracking (ET)
power DAC (pDAC)
radar pulsing
spectral confinement
supply modulator

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10.1109/TMTT.2016.2631171

Full-text PDF (author’s accepted manuscript)
This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Institute of Electrical and Electronics Engineers at https://ieeexplore.ieee.org/document/7786895 . Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 2.83 MB

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Dr Tommaso Cappello
- tommaso.cappellobristol.acuk
- Department of Electrical & Electronic Engineering - Lecturer
Person: Academic

Cite this

@article{77de4db490c54774a1c108bee3f85dee,

title = "Efficient Programmable Pulse Shaping for X -Band GaN MMIC Radar Power Amplifiers",

abstract = "This paper presents a supply modulated X-band 12-W peak power transmitter that maintains an average efficiency greater than 50% for various shapes of amplitude-modulated pulses. The main power amplifier is a two-stage GaN-on-SiC MMIC with a peak efficiency of 65%, while the pulse envelope modulator is a 95% efficient hybrid 3-b power DAC implemented with GaN-on-Si transistor switches. Envelope shaping of a pulsed waveform results in improved spectral confinement of greater than 15 dB for the first sideband compared with constant-envelope pulses, with over 20 points improvement in total efficiency. The combination of supply modulation and digital predistortion is shown to result in high composite (total) efficiency of over 55%, with simultaneous high dynamic range and with flexible digitally programmable pulse shaping.",

keywords = "envelope tracking (ET), power DAC (pDAC), radar pulsing, spectral confinement, supply modulator",

author = "Corrado Florian and Tommaso Cappello and Daniel Niessen and Paganelli, {Rudi Paolo} and Scott Schafer and Zoya Popovi{\'c}",

note = "Acceptance date is provisional and based on date of publication.",

year = "2017",

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day = "1",

doi = "10.1109/TMTT.2016.2631171",

language = "English",

volume = "65",

pages = "881--891",

journal = "IEEE Transactions on Microwave Theory and Techniques",

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TY - JOUR

T1 - Efficient Programmable Pulse Shaping for X -Band GaN MMIC Radar Power Amplifiers

AU - Florian, Corrado

AU - Cappello, Tommaso

AU - Niessen, Daniel

AU - Paganelli, Rudi Paolo

AU - Schafer, Scott

AU - Popović, Zoya

N1 - Acceptance date is provisional and based on date of publication.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - This paper presents a supply modulated X-band 12-W peak power transmitter that maintains an average efficiency greater than 50% for various shapes of amplitude-modulated pulses. The main power amplifier is a two-stage GaN-on-SiC MMIC with a peak efficiency of 65%, while the pulse envelope modulator is a 95% efficient hybrid 3-b power DAC implemented with GaN-on-Si transistor switches. Envelope shaping of a pulsed waveform results in improved spectral confinement of greater than 15 dB for the first sideband compared with constant-envelope pulses, with over 20 points improvement in total efficiency. The combination of supply modulation and digital predistortion is shown to result in high composite (total) efficiency of over 55%, with simultaneous high dynamic range and with flexible digitally programmable pulse shaping.

AB - This paper presents a supply modulated X-band 12-W peak power transmitter that maintains an average efficiency greater than 50% for various shapes of amplitude-modulated pulses. The main power amplifier is a two-stage GaN-on-SiC MMIC with a peak efficiency of 65%, while the pulse envelope modulator is a 95% efficient hybrid 3-b power DAC implemented with GaN-on-Si transistor switches. Envelope shaping of a pulsed waveform results in improved spectral confinement of greater than 15 dB for the first sideband compared with constant-envelope pulses, with over 20 points improvement in total efficiency. The combination of supply modulation and digital predistortion is shown to result in high composite (total) efficiency of over 55%, with simultaneous high dynamic range and with flexible digitally programmable pulse shaping.

KW - envelope tracking (ET)

KW - power DAC (pDAC)

KW - radar pulsing

KW - spectral confinement

KW - supply modulator

U2 - 10.1109/TMTT.2016.2631171

DO - 10.1109/TMTT.2016.2631171

M3 - Article (Academic Journal)

SN - 0018-9480

VL - 65

SP - 881

EP - 891

JO - IEEE Transactions on Microwave Theory and Techniques

JF - IEEE Transactions on Microwave Theory and Techniques

IS - 3

ER -

Efficient Programmable Pulse Shaping for X -Band GaN MMIC Radar Power Amplifiers

Abstract

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Keywords

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