Multi-core PCB Antenna Asymmetric Design
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Solution Overview
Problem
Conventional broadband antenna designs based on package substrate technology are costly, have long lead times, and limited design flexibility due to the need for symmetric, single-core structures with dummy layers, which increase manufacturing costs and time.
Innovation Solution
A multi-core printed circuit board (PCB) antenna design that replaces dummy layers with additional core layers, allowing for an asymmetric structure with varying core thicknesses and reduced metal layers, enhancing design flexibility and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional package substrate technology with symmetric single-core structure is used, then manufacturing precision and structural stability are improved, but device complexity and manufacturing cost increase due to dummy layers
Solution Approach 1:
The patent removes the unnecessary dummy layers from the conventional symmetric single-core structure. By extracting only the essential core layer and surrounding ground structures, the design achieves the required structural stability without the added complexity and cost of dummy layers, directly resolving the contradiction between manufacturing precision and device complexity
Solution Approach 2:
The patent transitions from a symmetric single-core structure to an asymmetric multi-core structure where each core layer can have different thicknesses and configurations. This asymmetric design allows optimization of each core for specific frequency ranges while eliminating the need for dummy layers, thereby reducing device complexity while maintaining manufacturing precision through controlled asymmetric geometry
2Stability of the object's composition
If conventional symmetric single-core structure with dummy layers is used, then structural stability is improved, but ease of manufacture deteriorates due to increased manufacturing time and cost
Solution Approach 1:
The patent divides the single core structure into multiple segmented core layers, each with optimized thickness for different frequency ranges. This segmentation allows each layer to be manufactured independently with standard PCB processes, reducing overall manufacturing time and cost while maintaining structural stability through the stacked configuration
Solution Approach 2:
The patent changes the structural parameters from a fixed symmetric single-core design to variable multi-core layers with different thicknesses. By adjusting core thickness parameters (e.g., 0.6mm, 0.4mm, 0.2mm for different layers), the design achieves structural stability for broadband performance while using standard manufacturing processes that reduce time and cost
3Device complexity
If conventional single-core structure is used, then manufacturing process simplicity is improved, but adaptability deteriorates due to limited design flexibility
Solution Approach 1:
The patent introduces dynamic adaptability by allowing different core layers to have different thicknesses and configurations optimized for specific frequency ranges. This dynamic design enables the same basic multi-core structure to adapt to various broadband requirements without changing the fundamental manufacturing process, thus maintaining simplicity while improving versatility
Solution Approach 2:
The multi-core structure serves multiple functions simultaneously: each core layer can be optimized for different frequency bands (enhancing adaptability), while the overall structure maintains a standard PCB manufacturing process (maintaining simplicity). The ground structures and inter-layer connections provide universal support for various antenna designs
Data Source
AI summary
A multi-core broadband printed circuit board (PCB) antenna and methods for fabricating such an antenna are provided. One example antenna implemented with a multi-core PCB generally includes a first core structure, a second core structure disposed above the first core structure, and one or more metal layers disposed above the second core structure or below the first core structure. The first core structure includes a first core layer, a first metal layer disposed below the first core layer, and a second metal layer disposed above the first core layer. The second core structure includes a second core layer, a third metal layer disposed below the second core layer, and a fourth metal layer disposed above the second core layer. The first core layer and the second core layer may have different thicknesses.