Propagation of TE01 waves in curved wave guides
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TE 01 waves transmitted through curve wave guides lose power by conversion to other modes, especially to TM 11 . This power transfer to coupled modes is explained by the theory of coupled transmission lines. It is shown that the power interchange between coupled lines and their propagation constants can be derived from a single coupling discriminant. Earlier calculations of TE 01 conversion loss in circular wave guide bends are confirmed and extended to S-shaped bends. Tolerance limits for random deflections from an average straight course are given.
[1] Max Wien,et al. Ueber die Rückwirkung eines resonirenden Systems , 1897 .