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

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

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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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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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doi = "10.1109/TMTT.2016.2631171",

language = "English",

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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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