602 



ELECTRICAL EQUIPMENT 



protective devices as they 

 dissipate the energy of high- 

 frequency waves. They are, 

 therefore, generally termed 

 " high-frequency absorbers." 

 Fig. 386 shows how the 

 reflection and transmission of 

 a traveling wave takes place 

 in a particular case with in- 

 ductance and resistance con- 

 centrated at the transition 

 point. The amplitude of the 

 waves as well as their wave 

 fronts are, of course, depen- 

 dent on the natural impe- 

 dances of the circuits on either 

 side of the transition point, 

 as well as on the value of the 

 inductance and resistance 

 concentrated at this point. 

 The calculations 

 are, however, of a 

 rather intricate 

 nature and be- 

 yond the scope of 

 this book. It is 

 seen, however, 

 that with a pro- 

 tective device of 

 this kind, both 

 the transmitted 

 and reflected 

 waves have steep 

 fronts although of 

 less height than 

 the original wave. 

 This has led to 

 FIG. 386.-The Reflection and Transmission of a th e suggestion of 

 Traveling Wave with Concentrated Inductance and adding & con- 

 Resistance at the Transmission Point. denser to Campos' 



