ANALYSIS OF THE SUBHARMONIC LOAD PULL CHARACTERISTIC OF THE MESFET POWER AMPLIFIER PRECISELY WITH THE VOLTERRA SERIES METHOD

Wang Bo; Hong Xingnan; Gao Baoxin; Pang Yunbo

Volume 24 Issue 7

Jul. 2002

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Article Navigation > Journal of Electronics & Information Technology > 2002 > 24(7): 968-975

Wang Bo, Hong Xingnan, Gao Baoxin, Pang Yunbo . ANALYSIS OF THE SUBHARMONIC LOAD PULL CHARACTERISTIC OF THE MESFET POWER AMPLIFIER PRECISELY WITH THE VOLTERRA SERIES METHOD[J]. Journal of Electronics & Information Technology, 2002, 24(7): 968-975.

Citation:

Wang Bo, Hong Xingnan, Gao Baoxin, Pang Yunbo . ANALYSIS OF THE SUBHARMONIC LOAD PULL CHARACTERISTIC OF THE MESFET POWER AMPLIFIER PRECISELY WITH THE VOLTERRA SERIES METHOD[J]. Journal of Electronics & Information Technology, 2002, 24(7): 968-975.

Citation:

Wang Bo, Hong Xingnan, Gao Baoxin, Pang Yunbo . ANALYSIS OF THE SUBHARMONIC LOAD PULL CHARACTERISTIC OF THE MESFET POWER AMPLIFIER PRECISELY WITH THE VOLTERRA SERIES METHOD[J]. Journal of Electronics & Information Technology, 2002, 24(7): 968-975.

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ANALYSIS OF THE SUBHARMONIC LOAD PULL CHARACTERISTIC OF THE MESFET POWER AMPLIFIER PRECISELY WITH THE VOLTERRA SERIES METHOD

Received Date: 2000-09-01
Rev Recd Date: 2001-01-19
Publish Date: 2002-07-19

Abstract

Abstract

In order to analyze the subharmonic load pull characteristic of MESFET power amplifier driven by CDMA type wide band signal, a set of Volterra transfer funcion expressions are deducted with the MESFET nonlinear model. With these expressions, the relation between the IM3 (third order intermodulation) and the subharmonic impedance is established, and the characteristic of the subharmonic load pull is analyzed. the expression of the optimal subharmonic load is also given with the analysis. It is proved in the paper that the reactance part of the subharmonic impedance is the main factor that leads to the difference of the two IM3. The result of the analysis agrees well with the simulation result got from ADS with harmonic balance method.

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References(1)

References

Xinwei. Wang. et al., A low quiescent current, 40% efficiency three-stage PHEMT power amplifier MMIC for PCS CDMA application, RFIC99, Anaheim, CA, USA, .]une 13 15. 1999. 121-121.[2]J.Staudinger. The importance of sub-harmonic frequency termination in modeling spectral regrowth from CW Am-Am Am-Pm derived nonlinearities, Annual Wireless Communication Conference. Boulder, CA, USA, Aug. 11-13, 1997, 121-125.[3]J. S. Kenney, et al., Power amplifier spectral regrowth for digital cellular and PCS applicatiions.Microwave Journal, 1995, 38(10), 74-92.[4]J.F. Sevic, K. L. Burger, M. B. Steer, A novel envelope-termination load pull method for ACPR optimization of RF/Microwave power amplifiers, 1998 IEEE MTT-S Digest, .June 7-12, 1998.Balimore, BD, USA, 723-726.[5]Wang Xinwei, et al., ACPR, IM3 and their correlation for a PCS CDMA power amplifier, .50th ARFTG Conference Digest, Benson Hotel, Portland, OR, 1997, 91-96.[6]洪兴楠,张向东,用Volterra级数展开表示法分析砷化镓场效应管交调失真,全国微波会议,西安,1985,132-152[7]S.A. Mass. Nonlinear Microwave Circuits, chapter 5, Norword, MA, Artech House 1988.

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