Abstract
The development of 5G communication technology has launched a serious challenge to the research of communication antenna substrate materials. In this work, we prepared a high-quality Co2W-type ferrite with a near mono-domain structure by oxide addition. It possesses excellent magnetic properties with an operating frequency of up to 2.2 GHz and a permeability of 2.4, which exhibits a significant high frequency advantage over most existing antenna substrate materials. In addition, its high frequency magnetic properties and micro-magnetic structure were deeply investigated based on theoretical fitting and electron microscopy techniques. Such an excellent magnetic properties are credited to the change in magneto-moment dynamics due to the transition of the domain structure by oxide addition. More importantly, this present work not only reveals the effect of micro-magnetic structure on magnetic properties more intuitively, but also provides a promising candidate for high-performance antenna substrate.
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