REFLEX OSL'ILLA TORS 



529 



have moved considerably away in frequency, and expanded tremendously. 

 There are still recrossings of the axis near the origin, however, as indicated 

 in this case by the dashed line which represents 2 crossings, in this case 

 about 4% in frequency above and below the middle crossing if the length of 

 the line t is X/2. 



Mp=I 00 



CD 0.25 



0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 



CONDUCTANCE, G 



Fig. 43. — Susceptance vs conductance for two resonators coupled by a quarter wave line. 

 The resonator at which the admittance is measured has a characteristic admittance of 100 

 in terms of a line characteristic admittance of unit}-. The other resonator has a character- 

 istic admittance of 200 and a shunt conductance of unity. The circles mark off relative 

 frequency increments of 5 X 10"' in terms of the resonant frequency. 



As a sort of horrible example, an admittance curve for a high () lead 50 

 wavelengths from the resonator was c( mputcd and is shown in Fig. 46. 

 Only a few of the loops are shown. 



Admittance curves for more complicated circuits such as impedance trans- 

 formers can be computed or obtained experimentally. 



