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THE BELL SYSTEM TECHNICAL JOURNAL, MAY 1953 



DESIRED 

 MODE SHAPE 



(FREQUENCY VARIED 



BY MEANS OF 

 REPELLER VOLTAGE) 



NEGATIVE OF 



ADMITTANCE FUNCTION 



REQUIRED TO PRODUCE 



MODE SHAPE OF 



COLUMN 1. PLOTTED 



TOGETHER WITH Yes '^ 



g - b PLANE 



INPUT IMPEDANCE 



VS. FREQUENCY OF 



NETWORK WHICH 



IN g-b PLANE 



APPEARS AS SHOWN 



IN COLUMN 2 



IDEAL MODE SHAPE 

 FOR ELECTRON- 

 ICALLY SWEPT 

 SIGNAL GENERATOR 



R F 



POWER 



OUT 



(a) 



(b) 



CONSTANT 

 EXCESS OF 



NEGATIVE 

 ELECTRONIC 

 ADMITTANCE 



(C) 



REALIZABLE MODE 



SHAPE BY MEANS 



OF COUPLED 



RESONATORS 



(d) 



RANGE OF CONSTANT 

 EXCESS OF NEGATIVE 

 ELECTRONIC 

 ADMITTANCE 



(f) 



CONVENTIONAL 



SINGLE -RESONATOR 



REFLEX KLYSTRON 



(SHOWN FOR 



COMPARISON) 



m 



(I) 



Fig. 6 — Desired mode shapes and passive circuit impedance functions re 

 quired to produce them. 



