Design of high-performance power-distributed amplifier using Lange couplers

Author

Agostino, Stefano D. ; Paoloni, Claudio

Author_Institution

Dipartimento di Ingegneria Elettronica, Rome Univ., Italy

Volume

42

Issue

12

fYear

1994

fDate

12/1/1994 12:00:00 AM

Firstpage

2525

Lastpage

2530

Abstract

An innovative topology of distributed amplifier based on input and output Lange couplers is presented. The modified operation mechanism of the new configuration, in comparison to the conventional distributed amplifier, determines a remarkable improvement of the output power, power-added efficiency, and small signal gain. The principle of the new amplifier topology, the theory, and several analytical results are discussed extensively. In addition, an accurate study and comparison between the performance of the Lange coupler distributed amplifier and the conventional distributed amplifier confirm the advantages of the configuration suggested. The Lange coupler distributed amplifier will be proved suitable in either large or small signal, as well as wide or narrowband applications

Keywords

MESFET integrated circuits; MMIC power amplifiers; UHF power amplifiers; distributed amplifiers; field effect MMIC; microstrip couplers; microwave power amplifiers; Lange couplers; high-performance amplifier design; large signal applications; narrowband applications; power-added efficiency; power-distributed amplifier; small signal gain; wideband applications; Couplers; Distributed amplifiers; Frequency; High power amplifiers; Impedance; Narrowband; Power amplifiers; Power generation; Topology; Transmission line theory;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.339792

Filename

339792