CPC H01P 3/127 (2013.01) [B64G 1/66 (2013.01); H01P 1/207 (2013.01); H01P 3/00 (2013.01)] | 16 Claims |
1. An elongate flexible waveguide section for radio frequency signals, wherein:
the waveguide section has a first series of corrugations in a longitudinal direction; and
the waveguide section has a second series of corrugations in at least a portion of a circumferential direction perpendicular to the longitudinal direction;
wherein the amplitude of the second series of corrugations is modulated by an amplitude of the first series of corrugations.
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