A new simultaneous noise and input power matching technique for monolithic LNAs using cascode feedback

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In this paper, a new simultaneous impedance-matching technique of Gamma(opt) (optimum noise-match source reflection coefficient) and G(max) (maximum available power gain-match (MAPG) source reflection coefficient) using cascode feedback (CF) is proposed, A 1.57-GHz single-stage monolithic-microwave integrated-circuit (MMIC) low-noise amplifier (LNA) designed with this technique has been fabricated using GaAs MESFET technology in order to verify the feasibility of this scheme, The measured response agrees well with the simulated performance, Extensive computer simulation shows that when silicon npn bipolar junction transistor (BJT) is used, this scheme enables us to make both Gamma(opt) and G(max) points near to 50 Omega, in addition to the simultaneous noise and input power matching, In addition, it has all the advantages of negative feedback such as stability, wider bandwidth, and insensitivity against parameter variation.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
1997-09
Language
English
Article Type
Article
Citation

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, v.45, no.9, pp.1627 - 1630

ISSN
0018-9480
URI
http://hdl.handle.net/10203/24775
Appears in Collection
EE-Journal Papers(저널논문)
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