A COUPLED RESONATOR REFLEX KLYSTRON 



745 



Hence 



vQk = Qgk = 1 (for critical coupling). 



(3.14) 



The effect of reducing the secondary resonator Q is to broaden the 

 frequency range over which a high input impedance or low admittance 

 may be maintained. This is clearly illustrated in Fig. 12 where curves 

 having the same value of conductance at resonance have been selected 

 from Figs. 7 and 11 and superimposed to facilitate comparison. 



(Qk) 



Fig. 12 — Comparison of admittance loci for coupled resonators of equal Q's 

 ith the case in which the secondary Q equals half the primary Q. 



