Statistical harmonic load termination analysis of switch-mode power amplifiers employing bandpass-pulse-length modulation

This paper presents a method to determine optimum load impedances from a statistical analysis of a harmonic load pull simulation for a switch-mode power amplifier fed with a bandpass-pulse-length modulated signal. The variability of the duty cycle caused by the modulation was taken into account. The...

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Hauptverfasser:	Krause, Sebastian, Maroldt, Stephan, Zech, Christian, Quay, Rudiger, Hein, Matthias A.
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	bandpass-RF pulse length modulation class-S Frequency modulation Gallium nitride GaN Harmonic analysis Impedance Microwave circuits switch-mode amplifier Transistors
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creator	Krause, Sebastian Maroldt, Stephan Zech, Christian Quay, Rudiger Hein, Matthias A.
description	This paper presents a method to determine optimum load impedances from a statistical analysis of a harmonic load pull simulation for a switch-mode power amplifier fed with a bandpass-pulse-length modulated signal. The variability of the duty cycle caused by the modulation was taken into account. Thereby, the crucial impact of the phase angle of the filter input reflection coefficient on the achievable efficiency is shown. The simulation was carried out for a 0.25μm gate length GaN based current-switching power amplifier. Based on the simulation results, a microstrip line network working as reconstruction filter was designed and fabricated. The demonstrator comprising the switch-mode power amplifier monolithic microwave integrated circuit and reconstruction filter achieved a drain efficiency and RF output power of up to 71.1% and 36.7dBm (4.6 W), respectively, over a frequency range from 870MHz to 930 MHz.
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The variability of the duty cycle caused by the modulation was taken into account. Thereby, the crucial impact of the phase angle of the filter input reflection coefficient on the achievable efficiency is shown. The simulation was carried out for a 0.25μm gate length GaN based current-switching power amplifier. Based on the simulation results, a microstrip line network working as reconstruction filter was designed and fabricated. The demonstrator comprising the switch-mode power amplifier monolithic microwave integrated circuit and reconstruction filter achieved a drain efficiency and RF output power of up to 71.1% and 36.7dBm (4.6 W), respectively, over a frequency range from 870MHz to 930 MHz.</description><identifier>EISBN: 9782874870323</identifier><identifier>EISBN: 2874870323</identifier><language>eng</language><publisher>European Microwave Association</publisher><subject>bandpass-RF pulse length modulation ; class-S ; Frequency modulation ; Gallium nitride ; GaN ; Harmonic analysis ; Impedance ; Microwave circuits ; switch-mode amplifier ; Transistors</subject><ispartof>2013 European Microwave Integrated Circuit Conference, 2013, p.340-343</ispartof><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/6687855$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>309,310,780,784,789,790,2056,54919</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/6687855$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Krause, Sebastian</creatorcontrib><creatorcontrib>Maroldt, Stephan</creatorcontrib><creatorcontrib>Zech, Christian</creatorcontrib><creatorcontrib>Quay, Rudiger</creatorcontrib><creatorcontrib>Hein, Matthias A.</creatorcontrib><title>Statistical harmonic load termination analysis of switch-mode power amplifiers employing bandpass-pulse-length modulation</title><title>2013 European Microwave Integrated Circuit Conference</title><addtitle>EuMIC</addtitle><description>This paper presents a method to determine optimum load impedances from a statistical analysis of a harmonic load pull simulation for a switch-mode power amplifier fed with a bandpass-pulse-length modulated signal. The variability of the duty cycle caused by the modulation was taken into account. Thereby, the crucial impact of the phase angle of the filter input reflection coefficient on the achievable efficiency is shown. The simulation was carried out for a 0.25μm gate length GaN based current-switching power amplifier. Based on the simulation results, a microstrip line network working as reconstruction filter was designed and fabricated. 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The variability of the duty cycle caused by the modulation was taken into account. Thereby, the crucial impact of the phase angle of the filter input reflection coefficient on the achievable efficiency is shown. The simulation was carried out for a 0.25μm gate length GaN based current-switching power amplifier. Based on the simulation results, a microstrip line network working as reconstruction filter was designed and fabricated. The demonstrator comprising the switch-mode power amplifier monolithic microwave integrated circuit and reconstruction filter achieved a drain efficiency and RF output power of up to 71.1% and 36.7dBm (4.6 W), respectively, over a frequency range from 870MHz to 930 MHz.</abstract><pub>European Microwave Association</pub><tpages>4</tpages></addata></record>
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subjects	bandpass-RF pulse length modulation class-S Frequency modulation Gallium nitride GaN Harmonic analysis Impedance Microwave circuits switch-mode amplifier Transistors
title	Statistical harmonic load termination analysis of switch-mode power amplifiers employing bandpass-pulse-length modulation
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