A 33W GaN HEMT Doherty amplifier with 55% drain efficiency for 2.6GHz base stations

A 33 W average output power Doherty power amplifier (PA) for 2.6 GHz band was developed using compact package advanced GaN HEMTs which have Cds reduced 20%. A small-footprint Doherty network was successfully designed with plain small signal analysis, and the method was very practical. The Doherty PA...

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Bibliographic Details
Published in2009 IEEE MTT-S International Microwave Symposium Digest pp. 1273 - 1276
Main Authors Deguchi, H., Ui, N., Ebihara, K., Inoue, K., Yoshimura, N., Takahashi, H.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2009
Subjects
Base stations
digital pre-distortion (DPD)
Doherty
Gain
Gallium nitride
GaN HEMT
HEMTs
LTE
Multiaccess communication
Packaging
Power amplifiers
Power generation
Signal analysis
Signal design
W-CDMA
WiMAX
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ISBN1424428033
9781424428038
ISSN0149-645X
DOI10.1109/MWSYM.2009.5165936

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Summary:A 33 W average output power Doherty power amplifier (PA) for 2.6 GHz band was developed using compact package advanced GaN HEMTs which have Cds reduced 20%. A small-footprint Doherty network was successfully designed with plain small signal analysis, and the method was very practical. The Doherty PA exhibited a saturation output power of 52.5 dBm (178 W) and a saturated drain efficiency of 65.6%. The Doherty PA also achieved a drain efficiency of 55%, an ACLR of -52.8 dBc and a power gain of 13.8 dB at the average output power of 45.2 dBm (33 W) with 4-carrier W-CDMA signal at 2.6 GHz using commercially available digital pre-distortion system. These excellent performances show good suitability for 2.6 GHz band base stations (BTS), for example, W-CDMA, LTE and WiMAX, and small-sized circuit structure contributes to realize compact remote radio head type of BTS.
ISBN:1424428033
9781424428038
ISSN:0149-645X
DOI:10.1109/MWSYM.2009.5165936