Microwave dielectric properties of Sr_.61Ba_.3Nb₂O₆single crystals at 35 and 58 GHz

Abstract

Abstract Microwave measurements on Sr.61Ba.39Nb2O6 single crystal samles show a large nonlinear susceptibility at 58 GHz and a large refractive index (∼ 18 to 20 along the polar axis) at 35 GHz. For propagation along the direction of an applied electric field in a sample cut at 45° to the polar axis, the change in index with applied field is found to be at least 1.2 × 10−6 m/V, corresponding to a half-wave voltage of 2000 V.