Integration of the ferrite devices in the RF front-end and active antennas is hindered by the need for external magnets. biasing soft microwave ferrites. The hexaferrite-based self-biased nonreciprocal devices can operate without external magnets at mm-wave frequencies but the currently available hexaferrite materials inflict high RF losses at lower frequencies. particularly in the wi... https://www.chiggate.com/loving-earth-jilungin-dreaming-tea-30g-cheap/