. The Bell System technical journal . Fig. 27 — Circular-olectric wave transducer (due to A. P. King). * A portion of this work was carried out under Office of Naval Research Con-tract Nonr 687(00). WAVEGUIDE AS A COMMTTXirATIOX MEDTT-M 1255. Fig. 28 — ^Nlode filters which pass only circuhir electric waves. they were in the sector at the left-hand end of Fig. 27, and the circular-electric wave emerges in the round pipe. This type of transducer hasbeen shown to have transfer losses from dominant-mode rectangularguide to circular-electric wave in round pipe of approximately dh at24,000 mc. S
. The Bell System technical journal . Fig. 27 — Circular-olectric wave transducer (due to A. P. King). * A portion of this work was carried out under Office of Naval Research Con-tract Nonr 687(00). WAVEGUIDE AS A COMMTTXirATIOX MEDTT-M 1255. Fig. 28 — ^Nlode filters which pass only circuhir electric waves. they were in the sector at the left-hand end of Fig. 27, and the circular-electric wave emerges in the round pipe. This type of transducer hasbeen shown to have transfer losses from dominant-mode rectangularguide to circular-electric wave in round pipe of approximately dh at24,000 mc. Similar models have been made by A. G. Fox for use at 48,000mc. Another important component is the mode filter previously referred toand which attenuates all wave types other than the circular electricwave family. One type of mode filter to perform this function is thespaced ring structure of Fig. 26 and another type, due to A. P. King,consists of resistive sheets along radial planes as shown in the photo-graph of Fig. 28. The circular electric wave family has no electric fieldin a radial direction or in a longitudinal direction. All other wave types,however, have radial-electric or longitudinal-electric field componentsand experienc
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
