SCIENCE CHINA Information Sciences, Volume 60, Issue 4: 042403(2017) https://doi.org/10.1007/s11432-016-0299-4

## A 5.8 GHz class-AB power amplifier with 25.4 dBm saturation power and 29.7\% PAE

• AcceptedJul 21, 2016
• PublishedJan 3, 2017
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### Abstract

In this paper, an effective and succinct radio-frequency (RF) grounding technique for class-AB power amplifier (PA) is presented. The proposed technique employs a grounding path, resonant with a capacitor in series at the center of the fundamental and second-order harmonic frequencies, between the critical ground nodes, to ensure a low impedance path. The power loss due to imperfect grounding is then reduced by 2 dB, and the saturated output power and power added efficiency (PAE) are therefore significantly improved. A fully integrated 5.8-GHz PA with the proposed technique is designed and implemented in a 65-nm CMOS process. Measured result shows a saturated output power of 25.4 dBm and a peak PAE of 29.7\%, while with only 2.5 V of supply voltage.

### Funded by

National High Technology Research and Development Program of China(863)

National Natural Science Foundation of China(61331003)

National Natural Science Foundation of China(Grants Nos. 61204026)

"source" : null , "contract" : "2015AA01A704"

### Acknowledgment

Acknowledgments

This work was supported by National High Technology Research and Development Program of China (863) (Grant No. 2015AA01A704), National Natural Science Foundation of China (Grants Nos. 61204026, 61331003), and Tsinghua University Initiative Scientific Research Program. The authors would like to thank Lorentz Solution for Peakview EM design and Keysight for measurement supports.

### References

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