Propagation in Shielded Helical Line Containing Azimuthally Magnetised Latching Ferrite

The propagation in an infinitely long thin-wire cylindrical helix, surrounded by a latching ferrite tube, magnetised azimuthally to remanence and perfectly conducting metallic shield is studied theoretically. The characteristic equation of the system for circularly symmetrical mode, involving the normalized phase constant, structure geometry, latching ferrite parameters and frequency is derived in terms of modified Bessel functions and Tricomi confluent hypergeometric functions. Detailed results concerning the phase constant and differential phase shift for a definite set of structure and material parameters and opposite directions of remanent flux are presented in normalized form, showing applications of the system considered as remanent latching phaser.