DocumentCode
2411316
Title
Determining optimum load impedance for a noisy active 2-port network.
Author
Ciccognani, Walter ; Giannini, Franco ; Limiti, Ernesto ; Longhi, Patrick Ettore ; Serino, Antonio
Author_Institution
Univ. di Roma Tor Vergata, Rome
fYear
2007
fDate
9-12 Oct. 2007
Firstpage
1393
Lastpage
1396
Abstract
The role of the impedance load when dealing with noisy two port networks is investigated. Its value acts directly on input and output return losses (IRL and ORL) that can be simultaneously achieved once input load has been fixed to an arbitrary value. A novel design chart, obtained after examining constant mismatch circles, is introduced, where optimum trade-off between IRL and ORL is promptly identified. The role of degenerative source feedback is highlighted to improve IRL/ORL trade-off.
Keywords
active networks; feedback; low noise amplifiers; constant mismatch circles; degenerative source feedback; input return loss; low noise amplifiers; noisy active 2-port network; optimum load impedance; output return loss; Active noise reduction; FETs; Impedance matching; Low-noise amplifiers; Microwave devices; Noise figure; Output feedback; Performance gain; Reflection; Stability;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Conference, 2007. European
Conference_Location
Munich
Print_ISBN
978-2-87487-001-9
Type
conf
DOI
10.1109/EUMC.2007.4405464
Filename
4405464
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