Hybrid Load-Modulated Balanced Amplifier With High Linearity and Extended Dynamic Range

Hybrid Load-Modulated Balanced Amplifier With High Linearity and Extended Dynamic Range

A novel hybrid load modulation (LM) architecture of power amplifier (PA) is presented in this letter, in which three amplifiers are combined through a quadrature coupler in properly defined phase offsets. Together with the well-aligned turning-on sequence, the PA can operate as a Doherty PA (DPA) an...

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Veröffentlicht in:IEEE microwave and wireless components letters 2021-09, Vol.31 (9), p.1067-1070
Hauptverfasser: Lyu, Haifeng, Chen, Kenle
Format: Artikel
Sprache:eng
Schlagworte:
Balanced amplifier
Doherty power amplifier (DPA)
Efficiency
Hybrid power systems
Linearity
load modulation (LM)
Loading
Microwave circuits
Modulation
Power amplifiers
Prototypes
Push-pull amplifiers
Quadratures
Wireless communication
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container_title IEEE microwave and wireless components letters
container_volume 31
creator Lyu, Haifeng
Chen, Kenle
description A novel hybrid load modulation (LM) architecture of power amplifier (PA) is presented in this letter, in which three amplifiers are combined through a quadrature coupler in properly defined phase offsets. Together with the well-aligned turning-on sequence, the PA can operate as a Doherty PA (DPA) and load modulated balanced amplifier (LMBA) at different power levels, whose overall behavior is similar to a three-way DPA. This unique hybrid LM mode effectively extends the dynamic power range of efficiency enhancement, which is further compatible with the high-linearity design. This concept is experimentally validated using a GaN-based prototype at 3.56 GHz. The CW measurement shows an efficient PA performance with 49%-63% of efficiency from P_{\mathrm {Max}} to 9-dB back off. Under the modulated evaluation using a 20-MHz LTE signal, an adjacent channel leakage ratio of −37.5 dB is measured together with 45% average efficiency.
doi_str_mv 10.1109/LMWC.2021.3083235
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Under the modulated evaluation using a 20-MHz LTE signal, an adjacent channel leakage ratio of −37.5 dB is measured together with 45% average efficiency.</description><subject>Balanced amplifier</subject><subject>Doherty power amplifier (DPA)</subject><subject>Efficiency</subject><subject>Hybrid power systems</subject><subject>Linearity</subject><subject>load modulation (LM)</subject><subject>Loading</subject><subject>Microwave circuits</subject><subject>Modulation</subject><subject>Power amplifiers</subject><subject>Prototypes</subject><subject>Push-pull amplifiers</subject><subject>Quadratures</subject><subject>Wireless communication</subject><issn>1531-1309</issn><issn>2771-957X</issn><issn>1558-1764</issn><issn>2771-9588</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kNFKwzAUhoMoOKcPIN4EvO7MSdomuZxzOqFDEGWXIW1Pt4yunWkL9u1t2fDq_By-_xz4CLkHNgNg-ilZbxYzzjjMBFOCi-iCTCCKVAAyDi_HLCAAwfQ1uWmaPWMQqhAmZLPqU-9ymtQ2D9Z13pW2xZw-29JW2RDmh2PpCoeebly7oyu33dHEVWi9a3tqq5wuf1us8gF96St7cBn9tNUWb8lVYcsG785zSr5fl1-LVZB8vL0v5kmQCRG3QWG14lxYiSGi0sAimWopQfCcC5FyDTBsONg4HXiwhQyzMMOUaWQ81VxMyePp7tHXPx02rdnXna-Gl4ZHsZJSRVoNFJyozNdN47EwR-8O1vcGmBn9mdGfGf2Zs7-h83DqOET853UotI5B_AEMOmpL</recordid><startdate>20210901</startdate><enddate>20210901</enddate><creator>Lyu, Haifeng</creator><creator>Chen, Kenle</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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Together with the well-aligned turning-on sequence, the PA can operate as a Doherty PA (DPA) and load modulated balanced amplifier (LMBA) at different power levels, whose overall behavior is similar to a three-way DPA. This unique hybrid LM mode effectively extends the dynamic power range of efficiency enhancement, which is further compatible with the high-linearity design. This concept is experimentally validated using a GaN-based prototype at 3.56 GHz. The CW measurement shows an efficient PA performance with 49%-63% of efficiency from &lt;inline-formula&gt; &lt;tex-math notation="LaTeX"&gt;P_{\mathrm {Max}} &lt;/tex-math&gt;&lt;/inline-formula&gt; to 9-dB back off. 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source IEEE/IET Electronic Library (IEL)
subjects Balanced amplifier
Doherty power amplifier (DPA)
Efficiency
Hybrid power systems
Linearity
load modulation (LM)
Loading
Microwave circuits
Modulation
Power amplifiers
Prototypes
Push-pull amplifiers
Quadratures
Wireless communication
title Hybrid Load-Modulated Balanced Amplifier With High Linearity and Extended Dynamic Range
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