High Efficiency Class E Power Amplifier with a New Output Network

Subject Areas : Majlesi Journal of Telecommunication Devices

Mohammad Heydari ¹ , Hooman Nabovati ²

1 - Department of Electrical Engineering, Sadjad Institute of Higher Education, Mashhad, Iran
2 - Department of Electrical Engineering, Sadjad Institute of Higher Education, Mashhad, Iran

Received: 2014-09-06 Accepted : 2014-09-06 Published : 2014-09-01

Keywords: en,

Abstract :

In this paper a new cascode class E power amplifier with a driving stage of class F and novel output network is proposed. Class F power Amplifier is able to produce square waves, used in driving of main stage, owing to use main frequency and third frequency harmonic. The proposed output network has also improved the parameters of circuit like efficiency, power added efficiency and output power with adding a capacitor and an inductor. In order to have more real results the circuit has been redesigned and simulated using spiral inductors.The simulation has taken place using 0.18 µm CMOS technology in ADS simulator software based on IEEE 802. 11b utilized in 2.4 GHz and WLAN applications. Proposed circuit delivers 23.1 dBm power; out of a 1.8 supply voltage to a 50Ω load with 84.3% efficiency and 80.4 % power added efficiency in 2.4 GHZ operating frequency.

References:

[1] A. Mazzanti, L. Larcher, R. Brama and F. Svelto, "Analysis of reliability and power efficiency in cascode class-E PAs," Solid-State Circuits, IEEE Journal of , vol.41, no.5, pp. 1222- 1229, May 2006.

[2] B. Razavi, "RF Microelectronics, " 2nd Edition, NJ: Prentice Hall PTR, 2011.

[3] F. Ellinger, "Radio Frequency Integrated Circuits and Technologies," Springer. Berlin: Springer, 2007.

[4] F.You, S.He, X.Tang, T.Cao, "Analysis of a class E power amplifier with series-parallel resonator," IET Circuit, Devices & Systems, vol.2, No.6, PP.476-484, 2008.

[5] H.Fouad, A.Halim, Z & K.Fawzy," Self-Biased 0.13-µm CMOS 2.4-GHz Class E Cascode Power Amplifier," 26th National Radio Science Conference (NRSC2009), March, 2009.

[6] M.Albulet, "RF Power Amplifier," Noble Publishing Corporation Atlanta, GA, 2001.

[7] M.Yavari, S.Naseh," High Efficiency Class-E Power Amplifier with a New Output Network", Electronics, Circuit & Systems, Int conference on, PP.334-337.

[8] N. O. Sokal and A. D. Sokal, "Class-E-a new class of high-efficiency tuned single-ended switching power amplifiers," IEEE J. Solid-State Circuits, vol. SC-10, no. 3, pp. 168–176, Jun. 1975.

[9] P.E.Allen, D.R.Holberg, "CMOS Analog Circuit Design, " Oxford University Press, second edition, 2002.

[10] S. A.Shahrani, "Design of Class-E Radio Frequency Power Amplifier," Blacksburg, Virginia, July 2001.

[11] C. Trask, “Class-F Amplifier Loading Networks: A Unified Design Approach” in IEEE MTT-S Dig., Anaheim, CA, pp. 351-354, June 1999.

[12] T.Wang, "Optimized class E RF power amplifier design in Bulk CMOS," university of TEXAS, December 2007.

[13] T.Sowlati,D.M.W. Leenaerts,"A2.4 GHz 0.18µm CMOS self-biased cascode power amplifier", Solid-State Circuits, IEEE Journal of , vol.38, Issue:8, pp. 1318- 1324,August 2003.