Looking for references on Doherty amplifiers

[Puppet1]

Need references on doherty amplifiers in gaas, cmos, bipolar and so on -- books, papers, theses, whatever, just tutorial in format.

Thanks.

 

[rficd]

doherty amplifier + bousnina

PLease refer to IEEE microwave magazine in 2006. there is one paper is directly related to this topic.

 

[khouly]

doherty amplifier tutorial

i think the books of steven cripps have some topics about doherty amplifiers

khouly

 

[martine]

doherty amplifier

check these references

M. Iwamoto, et al, “An extended Doherty amplifier with high efficiency over a wide range,” IEEE Trans. Microwave Theory & Tech., vol. 49, no. 12, pp. 2472-2479, December 2001.

S. Bousnina, “Analysis and design of high efficiency variable conduction angle Doherty amplifier,” ITE antenna & propagation journal, vol. 3, no. 3, pp. 416-425, April 2009.

 

[james ono]

doherty amplifier ads

How to optimize the conduction angle of the auxiliary amplifier biased class C to improve the linearity of the Doherty amplifier

 

[ChaoFan]

microwave magazine+doherty

Actully, you might want the loadpull impedances at Zmod and Zopt. Then you should simulate the matching circurt step by step. Nomally, for the peak amplifier, we choose Vgs=Vth-1.3V. It's not easy to say, it depands on your Gain, eff, linearity requirements. It's a trad off. Mostly, we use Doherty and DPD together. So we care more about the eff and Gain.

Added after 2 minutes:

I have to say sometimes you can't revise your linearity by DPD due to your bad AM to PM.

 

[james ono]

doherty amplifier+ads

Doherty amplifier with a PDP seems to be the best solution to improve simultaneously the efficiency and linearity.

Regarding this reference:
S. Bousnina, “Analysis and design of high efficiency variable conduction angle Doherty amplifier,” ITE antenna & propagation journal, vol. 3, no. 3, pp. 416-425, April 2009.

It seems that it is possible to design a Doherty amplifier with higher conduction angle of the auxiliary amplifier to improve the overall efficiency but the linearity will be worst and only a PDP can be helpful to improve it.
Up to what extent the PDP can improve the linearity such Doherty amplifier.

 

[hustpoly]

Re: doherty amplifier

Thank you very much !!!

check these references

M. Iwamoto, et al, “An extended Doherty amplifier with high efficiency over a wide range,” IEEE Trans. Microwave Theory & Tech., vol. 49, no. 12, pp. 2472-2479, December 2001.

S. Bousnina, “Analysis and design of high efficiency variable conduction angle Doherty amplifier,” ITE antenna & propagation journal, vol. 3, no. 3, pp. 416-425, April 2009.