Low-distortion MMIC power amplifier using a new form of derivative superposition

Author

Webster, Donald R. ; Haigh, D.G.

Author_Institution

Dept. of Electron. & Electr. Eng., Univ. Coll. London

Volume

49

Issue

2

fYear

2001

fDate

2/1/2001 12:00:00 AM

Firstpage

328

Lastpage

332

Abstract

Reduction of interchannel interference produced by a power amplifier near 1-dB compression is a key concern for the wireless communications industry. In this paper, we present a 100-mW monolithic-microwave integrated-circuit (MMIC) power amplifier designed using a novel form of the derivative superposition method. The measured results of the MMIC power amplifier showed a two-tone carrier-to-interference (C/I) ratio of 45 dBc with an efficiency of 22.5% when backed off by 4.5 dB from the 1-dB compression point. We demonstrate that the MMIC power amplifier represents a good compromise between C/I ratio, output power, efficiency, and gain at the cost of an increase in total gate width, by comparing it to class-A, class-AB, and class-B single field-effect-transistor amplifiers

Keywords

MMIC power amplifiers; adjacent channel interference; intermodulation distortion; 100 mW; 22.5 percent; MMIC power amplifier; carrier-to-interference ratio; derivative superposition; efficiency; field effect transistor; gate width; interchannel interference; intermodulation distortion; output power; wireless communication; Circuits; Computational modeling; Design automation; FETs; Field effect MMICs; Frequency; Interchannel interference; Intermodulation distortion; Nonlinear distortion; Power amplifiers;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.903093

Filename

903093