60 Watt Doherty amplifiers using high gain 2-stage hybrid amplifier modules

60 Watt Doherty amplifiers using high gain 2-stage hybrid amplifier modules

A Doherty amplifier has been constructed using small surface-mount 2-stage 30 W hybrid amplifier modules. These modules offer higher gain and simpler matching than do discrete transistors. This 26 dB gain Doherty amplifier uses a conventional 2-way topology, with class AB "main" branch and...

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Bibliographic Details
Published in:IEEE MTT-S International Microwave Symposium Digest, 2005 pp. 1383 - 1386
Main Authors: Crescenzi, E.J., Pengelly, R.S., Wood, S.M., Buss, R.E.
Format: Conference Proceeding
Language:English
Published: IEEE 2005
Subjects:
Copper
Electromagnetic heating
Gain
Microwave amplifiers
Microwave devices
Microwave transistors
Power amplifiers
Radio frequency
Radiofrequency amplifiers
Thick film circuits
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Description
Summary:A Doherty amplifier has been constructed using small surface-mount 2-stage 30 W hybrid amplifier modules. These modules offer higher gain and simpler matching than do discrete transistors. This 26 dB gain Doherty amplifier uses a conventional 2-way topology, with class AB "main" branch and class C "peaking" branch output stages. A 3GPP 2-WCDMA signal output level of 10 Watts is achieved with 26.4% efficiency and < -40 dBc ACLR and -38 dBc IM3s. When augmented by pre-distortion, 12.5 Watts of 2-WCDMA signal output is produced with < -51 dBc ACLR and -54 dBc IM3s, with 26.8 % efficiency.
ISBN:9780780388451
0780388453
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2005.1516941