Off resonance loss measurements in ferrites at 35 GHz

The effective-linewidth technique at 35 GHz has been applied to polycrystalline YIG and single crystal Zn/sub 2/-Y hexagonal ferrite with planar anisotropy. Because of static field limitations, it was necessary to use low-field rather than high-field extrapolations to obtain the baseline cavity parameters for the loss determinations. The results show that the low-field off-resonance effective linewidth of these materials is 12 Oe for YIG and 30 Oe for Zn/sub 2/-Y. The results are consistent with estimated values of the intrinsic losses in these materials. >