Ind 



ex 



Amplifier, negative-resistance, 61, 68, 72 



nonunilateral, 66, 71 



parametric, 73 



two-terminal-pair, classification of, 59 



Z7 < 0, 72 



unilateral, 71 



unilateral U > 1, 71 



wideband, 74 

 Amplifier cascade, 2 



Amplifier noise performance, criterion for, 5 

 Amplifiers, interconnection of, 55 

 Available power, 14 



Becking, A. G. Th., 46, 47 

 Belevitch, V., 33 



Canonical form, 31 



derivation of, 28 

 Cascading, problem of, 3 

 Characteristic-noise matrix, eigenvalues of, 23 



general formulation of, 38 



impedance formulation of, 22 



mixed voltage-current formulation of, 41 



trace of, 23 

 Circulator, 69, 72 

 Classification of networks and eigenvalues, 24 



in T-matrix representation, 40 



Classification of two-terminal-pair ampli- 

 fiers, 59 

 Cross-power spectral densities, 10 



Dahlke, W., 46, 47 



Eigenvalues, 22 



classification of, 24 



least positive, 53 

 Excess-noise figure, 48 



lower limit imposed on, 53 

 Exchangeable power, 15, 44 



matrix form for, 19 



matrix formulation of, 44 



n-terminal-pair networks, 15 



stationary values of, 22 

 Exchangeable-power gain, 43, 46 



algebraic signs of, 49 

 Extended noise figure, 43, 46 



Feedback, 3 

 lossless, 54 

 Franz, K., 2 

 Friis, H. T., 2 



Gain, available, 43 

 exchangeable-power, 43, 46 



77 



