Figure 2-5. Flexible waveguide.
c. Part C, Figure 2-5 shows another spirally constructed waveguide. Each strip is crimped tightly to the
next stage so that no slippage is possible. The waveguide is flexed by bending the thin walls of the corrugated
metal.
d. Part D, Figure 2-5 shows a flexible, one-piece waveguide. Here again the thin corrugated metal is bent.
2. Since skin effect keeps the current on the inner surface of the waveguide, the inside surfaces of the flexible
section are either chromium plated or silver plated for maximum current conductivity. The higher power losses
caused by reflections and standing waves of flexible waveguide make it impractical for general use. In places
where the use of flexible waveguide is required, the length is kept as short as possible to keep losses at a
minimum.
SS0031
2-6
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