Segmented Magnetic Core Antenna With Lateral Bridge Sub-Cores
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Solution Overview
Problem
Existing antennas with multiple sub-cores are susceptible to magnetic property fluctuations due to contact pressure and temperature variations, leading to instability and manufacturing complexity.
Innovation Solution
The use of at least one second sub-core that laterally overlaps two first sub-cores to create a magnetic bridge, stabilizing the contact points and gaps between them, thereby reducing sensitivity to temperature fluctuations and external influences while simplifying manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the core is constructed using multiple sub-cores arranged one behind the other, then the manufacturing complexity is reduced and fracture stability is improved, but the magnetic properties become susceptible to temperature fluctuations and vibrations
Solution Approach 1:
The core is divided into multiple first sub-cores arranged one behind the other, which simplifies manufacturing and reduces fracture risk. Each sub-core can be produced separately and assembled, making the overall core more robust while maintaining electrical functionality.
Solution Approach 2:
Second sub-cores are introduced as intermediary elements that laterally overlap the first sub-cores. These second sub-cores act as magnetic bridges that stabilize the magnetic properties at the contact points between first sub-cores, compensating for gaps or contact pressure variations caused by temperature and vibrations.
2Length of stationary object
If the sub-cores are arranged in contact with each other, then the core length is minimized, but the magnetic properties fluctuate with contact pressure variations
Solution Approach 1:
Second sub-cores serve as intermediary magnetic bridges at the contact points between first sub-cores. They laterally overlap the first sub-cores and provide stable magnetic coupling that is independent of contact pressure variations, thereby stabilizing the core's magnetic properties while maintaining compact length.
Solution Approach 2:
The design changes the magnetic coupling parameter from direct contact (pressure-dependent) to lateral overlap with magnetic bridging (pressure-independent). This parameter change ensures stable magnetic properties regardless of contact pressure fluctuations caused by temperature or vibrations.
3Reliability
If the sub-cores are spaced apart with a gap, then the magnetic property stability is improved, but the electrical properties are negatively affected by varying gap sizes
Solution Approach 1:
Second sub-cores act as magnetic intermediaries that laterally overlap the first sub-cores. They provide a stable magnetic bridge that compensates for gaps between first sub-cores, allowing the first sub-cores to be spaced apart without negatively affecting electrical properties. The second sub-cores ensure consistent magnetic coupling regardless of gap variations.
4Reliability
If a single long core is used, then the antenna range and bandwidth are maximized, but the core becomes more prone to breakage and complex to manufacture
Solution Approach 1:
The long core is segmented into multiple first sub-cores arranged one behind the other. This segmentation makes the core easier to manufacture, as each sub-core can be produced separately with simpler processes, and reduces the risk of breakage during handling and assembly. The segmented structure maintains the required electrical length for antenna performance.
Solution Approach 2:
Second sub-cores are introduced as intermediary elements that laterally overlap the first sub-cores and provide magnetic bridging. This ensures that the segmented core maintains stable magnetic properties equivalent to a single long core, maximizing antenna range and bandwidth while benefiting from the manufacturing and fracture resistance advantages of segmentation.
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
This design results in a robust antenna with stable magnetic properties and reduced susceptibility to breakage, facilitating easier production and improved fracture stability.
Implementation Method 1
The use of at least one second sub-core, which laterally overlaps two of the at least two first sub-cores, allows for a magnetic bridging of the contact point or gap between the first sub-cores
Data Source
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AI summary
An antenna comprising a magnetic core (1) and a coil (2) wound around the magnetic core (1), the magnetic core (1) comprising at least two first subcores (1.1) and at least one second subcore (1.2), the at least two first subcores (1.1) being arranged one behind the other in a longitudinal direction (8) of the magnetic core (1), each of the at least two first subcores (1.1) having a lateral side, the at least two first subcores (1.1) comprising a first first subcore (1.1) and a second first subcore (1.1), the at least one second subcore (1.2) comprising a first second subcore (1.2) being arranged on the lateral side of the first first subcore (1.1) and on the lateral side of the second first subcore (1.1) such that the first second subcore (1.2) is at least partially connected to the first first subcore (1.1) and at least partially to the second first Subcore (1.1) overlaps.