Dynamic Nonlinear Model of a Cancelation Loop with Application to the Feedforward Linearization Technique

Author

Gadringer, Michael E. ; Silveira, Daniel ; Magerl, Gottfried

Author_Institution

Inst. of Electr. Measurements & Circuit Design, Vienna Univ. of Technol.

fYear

2006

fDate

10-15 Sept. 2006

Firstpage

1173

Lastpage

1176

Abstract

In most publications on the behavior of the cancelation loops within a feedforward amplifier (FFA) the use of frequency independent nonlinear amplifiers was assumed. The only frequency dependent effect treated in detail was a time delay mismatch occurred within these loops. This paper discusses the balancing of a cancelation loop (CL) in the presence of a dynamic nonlinear (DN) device. Using this result the behavior of this structure is analyzed and the decomposition of the residual output signal is performed. A comparison of the major contributors to this output signal is presented and steps for a further reduction of the residual signal power are discussed

Keywords

feedforward amplifiers; nonlinear dynamical systems; cancelation loop; dynamic nonlinear model; feedforward amplifier; feedforward linearization; Circuit synthesis; Delay effects; Linearization techniques; Microwave amplifiers; Microwave theory and techniques; Performance analysis; RF signals; Radio frequency; Radiofrequency amplifiers; Signal analysis; Cancelation loops; Feedforward amplifiers; Nonlinear dynamic model;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2006. 36th European

Conference_Location

Manchester

Print_ISBN

2-9600551-6-0

Type

conf

DOI

10.1109/EUMC.2006.281167

Filename

4058036