Abstract
A magneto-dielectric substrate material with high permeability and low loss at high frequency is necessary for a miniaturized antenna. Keeping the loss low is essential, in order to restrain the eddy current effect and to possess a high magnetic resonance frequency. In this work, the effects of the NaOH concentration and soaking time on crystal structures and morphologies of Co80Ni20 alloy particles are studied based on a polyol process. The results reveal that the size of particles increase with the promotion of the concentration of NaOH and soaking time. The electromagnetic (EM) properties of Co80Ni20 alloy particles/ polyurethane composites with various soaking times are studied at the NaOH concentration of 1.5 mol/L. The results reveal that the real part of permeability (μ'), the real part of permittivity (ε'), the magnetic loss tangent (tanδμ), the dielectric loss tangent (tanδε) of the composite with the soaking time of 3 h are 2.0, 11.0, 0.09, and 0.057 at 1 GHz, respectively, and the eddy current effect is suppressed effectively. The calculation of the permeability shows that the composite possesses a high domain wall resonance frequency. This work is significant for developing a magneto-dielectric substrate material using at 1 GHz.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
