A COUPLED RESONATOR REFLEX KLYSTRON 



763 



and in particular those making use of the improved modulation linearity 

 resulting from the use of two resonators, could not be tried since the 

 required test apparatus^ was unavailable. The close correlation between 

 theory and experiment, however, as demonstrated in Section 4.3.3 leaves 

 little doubt as to the feasibility of such applications. 



Two examples of the use of the coupled resonator reflex klystron as a 

 microwave sweeper are given in Fig. 22. The first example shows the 

 band pass characteristic of a channel filter, 28 mc wide. The second 

 example demonstrates the use of this tube in a Q-measurement scheme^ 



SUCCESSIVE PHOTOGRAPHS OF OSCILLOSCOPE DISPLAY 

 SHOWING IF-POWER AS A FUNCTION OF FREQUENCY WITH 

 SIGNAL GENERATOR TUNED TO DIFFERENT FREQUENCIES 



GAIN-FREQUENCY CHARACTERISTIC OF 

 IF AMPLIFIER USING COUPLED- RESONATOR 

 REFLEX KLYSTRON AS SWEEP SOURCE 



CENTER FREQUENCY OF IF-AMPL=70MC 

 FLAT BANDWIDTH OF IF-AMPL = 22MC 



GAIN-FREQUENCY CHARACTERISTIC OF 

 SAME IF AMPLIFIER AS OBTAINED BY 

 CONVENTIONAL (SINGLE RESONATOR) 

 REFLEX KLYSTRON. DISTORTION IN GAIN 

 ENVELOPE DUE TO MODE SHAPE OF 

 KLYSTRON, 



Fig. 23 — Example of application of coupled resonator reflex klystron as inter- 

 mediate frequency sweeper. 



i 



