Microwave Reciprocal Latching Ferrite Phase Shifters.

The report describes analytical and experimental investigations carried out on dual-mode, reciprocal, latching ferrite phase shifters, with special emphasis placed on low insertion loss and low potential cost for production quantities. Analytical work has been directed at providing design limit and tradeoff information that may be of value to the system designer as well as to the phase shifter designer. Experimental models have been built at S-band and C-band using lithium-titanium ferrite materials. The most favorable frequency region for the dual-mode phase shifter extends from about 5 GHz to about 20 GHz. Bandwidths up to 10 percent can be obtained with moderate phase shift dispersion, and the greatest practical bandwidth appears to be on the order of 30 percent. Insertion loss at or below 1.0 dB is readily achievable.