Multi-layer magneto-dielectric material
A technology of dielectric materials and dielectric material layers, applied in the field of magnetic materials, can solve the problems of multi-layer structure permittivity shift, antenna resonance frequency shift, etc.
Active Publication Date: 2020-02-14
ROGERS CORP
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Problems solved by technology
In both types of failure modes, the dielectric constant of the multilayer structure will shift, resulting in a corresponding shift in the resonant frequency of the antenna
Method used
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[0015] Although the following detailed description contains many details for purposes of illustration, those of ordinary skill in the art will understand that many changes and modifications to the following details are within the scope of the invention. Accordingly, the following example embodiments are set forth without loss of generality and without imposing limitations on the claimed invention.
[0016] Embodiments as shown in the various figures and described in the accompanying text provide a magnetodielectric or cavity loaded material having multiple layers of ferromagnetic material alternately sandwiched between layers of low loss dielectric material.
[0017] E.g, figure 1 It is shown that the magnetodielectric material 100 includes a plurality of layers 102 in conformal direct contact with corresponding adjacent layers alternating between the dielectric material 200 and the ferromagnetic material 300, forming a contact with a plurality of ferromagnetic materials. Mag...
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Abstract
A magneto-dielectric material operable between a minimum frequency and a maximum frequency, having: a plurality of layers that alternate between a dielectric material and a ferromagnetic material, lowermost and uppermost layers of the plurality of layers each being a dielectric material; each layer of the plurality of ferromagnetic material layers having a thickness equal to or greater than 1 / 15tha skin depth of the respective ferromagnetic material at the maximum frequency, and equal to or less than l / 5th the skin depth of the respective ferromagnetic material at the maximum frequency; eachlayer of the plurality of dielectric material layers having a thickness and a dielectric constant that provides a dielectric withstand voltage across the respective thickness of equal to or greater than 150 Volts peak and equal to or less than 1,500 Volts peak; and, the plurality of layers having an overall thickness equal to or less than one wavelength of the minimum frequency in the plurality oflayers.
Description
[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Application Serial No. 15 / 850,466, filed December 21, 2017, which claims the benefit of U.S. Provisional Application Serial No. 62 / 437,807, filed December 22, 2016 , the entire contents of both applications are incorporated herein by reference. Background technique [0003] The present disclosure relates generally to magnetic dielectric materials, in particular to multilayer magnetic dielectric materials, and more particularly to multilayer magnetic dielectric thin film materials. [0004] Multilayer dielectric-magnetic structures have the benefit of utilizing shape anisotropy to generate higher ferromagnetic resonant frequencies and utilizing favorable mixing rules of dielectric and magnetic materials to generate A structured arrangement of magnetic permeability, which is ideal for patch-derived antenna structures. However, due to the high ratio of the amount of dielectric m...
Claims
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IPC IPC(8): H01Q1/38H01Q9/04H05K1/03
CPCH01Q1/38H05K1/0373H05K2201/0195H05K2201/086H01Q9/0407H01F10/14H01F10/265H01F10/30
Inventor 卡尔·施普伦托尔阿尼鲁达·J·希尔陈亚杰穆拉利·塞瑟马达范
Owner ROGERS CORP