Equivalent Circuit Characterization of a Periodically Loaded Ferrite Phase Shifter.
ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA ADVANCED SENSORS DIRECTORATE
Pagination or Media Count:
An equivalent circuit model is derived for a periodically loaded, non-reciprocal, ferrite phase shifter. It is shown that the enhanced differential phase shift that results from periodic loading can be explained by a change in the periodic circuit inductance and capacitance values that occur due to the propagation constant variation resulting from the ferrite toroid magnetization. By curve fitting the analytical model to the experimental data, the circuit values were obtained for both states of remanent maxima magnetization as well as a ficticious mean state. A measurement procedure is described in which the latter is predicted by conventional resonant line techniques and yields the reciprocal characteristics of the model. The non-reciprocal characteristics are determined from differential phase shift measurements. The comparison of measured and analytic data indicates that the model represents the circuit well over its entire passband.
- Electrical and Electronic Equipment