Magnetic Multilayer Composite for High-Frequency Antenna Permeability
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Solution Overview
Problem
Existing high frequency, very high frequency, and ultrahigh frequency antennas face challenges in balancing the magnetic materials relative to non-magnetic materials, affecting performance.
Innovation Solution
A magnetic multilayer composite is developed, comprising a core substrate layer with outer and inner magnetic layers, achieving a magnetic volume ratio of at least 0.005 and a permeability rating exceeding 100 within the range of 10 MHz to 10 GHz, optimized for improved antenna performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If soft magnetic materials are added to high frequency antennas, then antenna performance is improved, but the balance between magnetic and non-magnetic materials becomes unbalanced
Solution Approach 1:
The magnetic material is divided into multiple thin layers (first magnetic layer, second magnetic layer, third magnetic layer) separated by non-magnetic substrate layers. This segmentation allows precise control of magnetic volume ratio while maintaining performance benefits, resolving the contradiction between improving antenna performance and maintaining material balance.
Solution Approach 2:
The patent creates a composite multilayer structure combining magnetic materials (cobalt, nickel, iron, or their alloys) with non-magnetic substrate materials. This composite approach enables tuning of the magnetic volume ratio to at least 0.005, achieving both improved antenna performance and proper material balance simultaneously.
2Reliability
If magnetic material volume is increased to improve performance, then permeability increases, but the volume ratio becomes excessive
Solution Approach 1:
The patent optimizes the magnetic volume ratio parameter to at least 0.005 by controlling layer thicknesses and material compositions. This parameter optimization achieves sufficient magnetic permeability for high-frequency antenna performance while preventing excessive magnetic material content, resolving the contradiction between permeability enhancement and volume ratio control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composite enhances the performance of antennas by balancing magnetic and non-magnetic materials, achieving superior magnetic permeability and frequency response.
Implementation Method 1
The composite may further include a permeability rating (X, Y), where the permeability rating (X, Y) is equal to a peak point (X, Y) along a plot of the imaginary part of magnetic permeability (μ′′) of the composite plotted as a function of frequency
Data Source
AI summary
The present disclosure relates to a magnetic multilayer composite that may include a core substrate layer, an outer magnetic layer overlying a first surface of the core substrate layer, and an inner magnetic layer underlying a second surface of the core substrate layer. The composite may include a magnetic volume ratio VM/VS of at least about 0.005, where VM is equal to the total volume of magnetic material in the composite and VS is the total volume of substrate. The composite may further include a permeability rating (X, Y), where the permeability rating (X, Y) is equal to a peak point (X, Y) along a plot of the imaginary part of magnetic permeability (μ″) of the composite plotted as a function of frequency, where X is within the range of 10 MHz to 10 GHz, and Y is greater than 100.