. The Bell System technical journal . Fig. 2 — Sketch of the magnetic intensity (//), electric intensity (E) andPoynting Vector (P) for parallel-wire and circular-electric waveguides. Becausethe main energy flow (P) in the circular electric waveguide is associated withelectric field lines that close on themselves and do not produce accumulations ofcharge on the metal walls, the wall currents and associated losses are very small. * For further discussion, see G. C. Southworth, Principles and Applications ofWaveguide Transmission, D. Van Nostrand, Inc. pp. 175-178. WAVEGUIDE AS A COMMUNICATION M
. The Bell System technical journal . Fig. 2 — Sketch of the magnetic intensity (//), electric intensity (E) andPoynting Vector (P) for parallel-wire and circular-electric waveguides. Becausethe main energy flow (P) in the circular electric waveguide is associated withelectric field lines that close on themselves and do not produce accumulations ofcharge on the metal walls, the wall currents and associated losses are very small. * For further discussion, see G. C. Southworth, Principles and Applications ofWaveguide Transmission, D. Van Nostrand, Inc. pp. 175-178. WAVEGUIDE AS A COMMUNICATION MEDIUM 1215 4030 ^ ^ ^y ^ X . ^ TE„ y^ 20 MODES 300^ 108 ::n ^ ^ 10 r fJ 4 ^ V, 6 ^ ^ 54 2^ ^ ^TEo, ^^^^V^ 3 V.^ 2 100^ \ V L 200^ 1 1 1 300^ ,1, 10- 4 5 6 S 10 4 5 6 8 10= FREQUENCY IN MEGACYCLES PER SECOND Fig. 3 — Round guide diameter versus frequency for attenuation of 2 db/mile. As a consequence of the iiiiiisiial loss versus frequency characteristicof the circular electric wave, the diameter required in order to achieve ag
Size: 1956px × 1278px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
