Magnetoelectric microwave phase shifter

Abstract

An electric field tunable yttrium iron garnet (YIG)-lead zirconate titanate (PZT) phase shifter based on ferromagnetic resonance (FMR) is designed and characterized. The electric field control of the phase shift $\delta \phi$ arises through magnetoelectric interactions. The piezoelectric deformation in PZT in an electric field $E$ leads to a shift in the FMR frequency in YIG and a phase shift. For $E=5–8\mathrm{kV}∕\mathrm{cm}$ applied across PZT, $\delta \phi =90°–180°$ and an insertion loss of $1.5–4\mathrm{dB}$ are obtained. Theoretical estimates of $\delta \phi$ are in excellent agreement with the data.