Nonreciprocal millimeter wave latching phase shifter utilizing magnetodielectric phase-frequency bistability effect

• Published in: Microwave and optical technology letters Vol. 56; no. 8; pp. 1759 - 1764
• Main Authors: Popov, Maksym A., Zavislyak, Igor V., Movchan, N. N., Srinivasan, Gopalan
• Format: Journal Article
• Language: English
• Published: New York Blackwell Publishing Ltd 01.08.2014; Wiley Subscription Services, Inc
• Subjects: barium hexaferrite; Bistability; Frequency ranges; latching phase shifter; magnetodielectric resonance; Mathematical models; Microwaves; Phase shift; Phase shifters; phase-frequency bistability; Resonant frequencies; Switching
• ISSN: 0895-2477; 1098-2760
• DOI: 10.1002/mop.28434

ABSTRACT The effect of phase‐frequency bistability in magneto‐dielectric hexaferrite resonator has been investigated in 35–40 GHz frequency range. It is shown that switching between saturated and multidomain states results in switching of mode frequency and corresponding modification of insertion losses and phase shift in the region between initial and final resonant frequencies. A theory based on equivalent circuit model is found to adequately predict both losses and phase shift. A prototype of millimeter‐wave latching discrete phase shifter on the basis of the bistability effect is suggested, and its parameters are compared with characteristic for discrete phase shifters. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1759–1764, 2014