ELECTRICAL WAVE FILTERS 



427 



58 59 



61 62 63 64 65 66 67 68 69 



FREauENCY IN KILOCYCLES PER SECOND 



Fig. 19 — Measured insertion loss characteristic of a band-pass filter. 



75 



a. 40 



496 497 498 499 500 



FREQUENCY IN KILOCYCLES PER SECOND 



Fig. 20 — Measured insertion loss characteristic of a band-pass filter at a high 



frequency. 



