A STRAIN ENGINEERED VOLTAGE TUNABLE MILLIMETER-WAVE FERRITE PHASE SHIFTER

作者：Tatarenko A S; Srinivasan G^*

来源：Microwave and Optical Technology Letters, 2011, 53(2): 261-264.

DOI：10.1002/mop.25725

• ferrite
• piezoelectric
• magnetoelectric
• phase shifter

A 50-GHz electric field tunable ferrite-piezoelectric phase shifter based on a bilayer of single crystal M-type hexagonal barium ferrite (BaM) and lead zirconate titanate (PZT) is discussed. A dc voltage applied to PET results in a piezoelectric strain that manifests as an anisotropy field in BaM. A change in the voltage applied to PZT gives rise to variations in the anisotropy field and permeability of BaM and, therefore, a differential phase shift. A phase shift of 45 is measured when the voltage is increased from 0 to 400 V across a 0.5-mm thick PZT. Theoretical estimates of the phase shift are in agreement with the data.

• 出版日期2011-2