Preparation method of ferrite-based magnetic antenna substrate

Abstract

The invention discloses a preparation method of a ferrite-based magnetic antenna substrate, which specifically comprises the following steps: firstly, carrying out ALD (Atomic Layer Deposition) treatment on a ferrite raw material; and carrying out composite processing on the ferrite powder and the polymer to obtain the antenna substrate. According to the method, the appropriate low-loss deposition layer material is selected, the surface of the ferrite powder is processed through the ALD technology, the thickness of the deposition layer is controlled, and the magnetic dielectric loss of the substrate is reduced on the premise that the magnetic conductivity is not affected.

Description

technical field

[0001] The invention belongs to the technical field of antenna substrate preparation, and in particular relates to a preparation method of a ferrite-based magnetic antenna substrate. Background technique

[0002] The miniaturization (compact) design of antennas based on traditional non-magnetic dielectric substrates often conflicts with the broadband requirements of antennas. In response to this problem, researchers are currently mainly optimizing the physical structure of the antenna to obtain a certain degree of improvement. According to electromagnetic theory, the size of the antenna is an integer multiple of a quarter of the wavelength of the medium, so using magnetic materials as the antenna substrate can significantly reduce the physical size of the antenna by increasing the permeability of the medium. At the same time, the bandwidth of the antenna can be understood as the impedance matching problem between the medium and the air. As the magnetic perme...

Images