INVESTIGATION OF FERRITE PHASE-SHIFTERS AT C- AND X-BAND
Final rept. for 1 Jul 1964-30 Jun 1965
GENERAL ELECTRIC CO SYRACUSE NY ELECTRONICS LAB
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The phase shifters discussed are nonreciprocal. They contain circumferentially magnetized ferrite cylinders, which work at remanence. The differential phase shift is controlled by partial magnetization of the ferrite, achieved by controlled flux transfer. Three problems, common to all such phase shifters are dealt with The efficiency of flux transfer and the possibility to add flux bits. Experimental data and a theory in agreement with these data are presented. The determination of r-f magnetic threshold fields above which the losses of ferrites increase with field strength. The threshold is calculated from the measured threshold power of guides completely or in part filled with ferrite. The influence of waveguide and ferrite dimensions on the frequency dependence of the differential phase shift, on the proportionality between phase shift and transferred flux, and on the peak power handling capability is investigated experimentally. Slabline and waveguide type devices have been used.
- Electrical and Electronic Equipment