Analytical Study of Helical Latching Ferrite Phaser Structure

Abstract

The propagation of circularly symmetrical mode in an infinitely long thin-wire helix, wound on a latching ferrite cylinder, magnetised azimuthally to remanence and surrounded by homogeneous, isotropic, lossless dielectric and perfectly conducting metallic shield is studied analytically. The characteristic equation of the system, involving the normalized phase constant, structure geometry, parameters of both media and the frequency is derived in terms of modified Bessel functions and Kummer confluent hypergeometric functions. The nonreciprocal phase characteristics of the structure, assuming Marconi latching ferrite L1A and thermal conducting dielectrics are presented in normalized form for opposite directions of remanent flux, showing application of the system as practical remanent latching phaser.