Analysis and linearization of a broadband microwave phase modulator using Volterra system approach

Author

Celka, Patrick ; Hasler, Martin J. ; Azizi, Ataollah

Author_Institution

Dept. of Electr. Eng., Swiss Federal Inst. of Technol., Lausanne, Switzerland

Volume

44

Issue

12

fYear

1996

fDate

12/1/1996 12:00:00 AM

Firstpage

2246

Lastpage

2255

Abstract

In this paper, a Volterra system approach is employed to analyze a nonlinear delay line that is used as broadband phase modulator. Computed response waveform of the modulator in the time domain is compared with experimental results in order to confirm the Volterra system approach. The phase versus voltage characteristics of the modulator is then linearized using a predistortion circuit in which the parameters are derived from the Volterra kernels. Harmonic and intermodulation distortions are calculated with and without the predistortion circuit. It is shown that the use of the predistortion circuit results in a considerable reduction of these distortions

Keywords

Volterra series; delay lines; harmonic distortion; intermodulation distortion; linearisation techniques; modulators; nonlinear network analysis; phase modulation; transmission line theory; IMD; Volterra system approach; broadband microwave phase modulator; harmonic distortion; intermodulation distortion; linearization; nonlinear delay line; phase/voltage characteristics; predistortion circuit; Capacitance-voltage characteristics; Delay lines; Diodes; Distributed parameter circuits; Linearity; Phase modulation; Predistortion; Transmission lines; Varactors; Voltage;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.556453

Filename

556453