Slow Waves Guided by Parallel Plane Tape Guides

Waves guided by two parallel metallic plates of infinite extent, containing cuts at periodic intervals, are investigated for a number of cases with special emphasis upon the relative directions of the cuts in the top and bottom plates. Two fundamental slow-wave modes exist for all frequencies, in general. The latter are functions of tilt angles of the cuts, frequency, and plate separation. For tilt angles psi in the top and +- psi in the bottom plane, the amplitudes of the even and odd modes are independent of each other, while for other angles in the bottom plane a predetermined linear combination of even and odd terms exist for each mode.