Title :
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
fDate :
12/1/1994 12:00:00 AM
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;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
