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

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,...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 1994-12, Vol.42 (12), p.2525-2530
Main Authors: D'Agostino, S., Paoloni, C.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Couplers
Distributed amplifiers
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Frequency
High power amplifiers
Impedance
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Narrowband
Power amplifiers
Power generation
Topology
Transmission line theory
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Summary: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.< >
ISSN:0018-9480
1557-9670
DOI:10.1109/22.339792