. The Bell System technical journal . MEASUREDINSERTION LOSS reflection gain(each end) Vs^-^-^.-X-^- ->-^^-^----<^^--^-. 80 90 100 110 120 FREQUENCY IN MEGACYCLES 140 Fig. 13—Measured insertion loss of a wide-band transformer. shows the measured insertion loss of a wide-band low-impedance trans-former which transforms from 70 ohms down to an impedance of The useful transformation band is from 80 megacycles to 120megacycles. The measuring circuit is shown in Fig. 14. It consists ;,j/j/;;,!/t//jiiin;^ 70cj -VvW- YZZ7ZZ2ZZZZZ, I Ml 111^ i-rrr% >>>^>l>> til &g
. The Bell System technical journal . MEASUREDINSERTION LOSS reflection gain(each end) Vs^-^-^.-X-^- ->-^^-^----<^^--^-. 80 90 100 110 120 FREQUENCY IN MEGACYCLES 140 Fig. 13—Measured insertion loss of a wide-band transformer. shows the measured insertion loss of a wide-band low-impedance trans-former which transforms from 70 ohms down to an impedance of The useful transformation band is from 80 megacycles to 120megacycles. The measuring circuit is shown in Fig. 14. It consists ;,j/j/;;,!/t//jiiin;^ 70cj -VvW- YZZ7ZZ2ZZZZZ, I Ml 111^ i-rrr% >>>^>l>> til > I )j . I ijjjjjt -V2 ^ l}}i:iiiii:i inn!}iiiiiii*iiik r Fig. 14—Measuring circuit for a transformer. COAXIAL AND BALANCED TRANSMISSION LINES 301 of a source of high-frequency voltage impressed on a divided one branch is a series resistance of 70 ohms connected to the 70-ohmside of the transformer. The output of the transformer is connected 80 70 60 u 50 CD (n 40 O _j zo 30 20 10 r jT\ lo 58 59 60 61 62 63 64 65 66 FREQUENCY IN MEGACYCLES 67 68 69 70 Fig. IS^Measured insertion loss of filter used on
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
