Thermoformed Composite Antenna Assembly
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Solution Overview
Problem
The high cost and complexity of manufacturing wireless device antennas and feed networks using traditional methods, such as stamped metal elements and flex-circuit assemblies, hinder cost reduction and efficiency in the production of sophisticated wireless devices.
Innovation Solution
A method involving thermoforming of conductive layers between non-conductive carrier sheets to create cost-effective and reliable wireless antennas, where the conductive layers are applied to a plastic sheet and formed into three-dimensional structures using vacuum forming, allowing for multi-band coverage and integration with circuit boards through capacitive coupling or protrusions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional stamped metal elements or flex-circuit assemblies are used for antenna manufacturing, then antenna performance and reliability are maintained, but production cost and manufacturing complexity increase significantly
Solution Approach 1:
The patent combines the antenna conductive elements, feed network, and ground plane into a single integrated structure formed from one continuous piece of conductive material through stamping and forming operations. This merging eliminates the need for separate stamped metal elements and flex-circuit assemblies, reducing both component count and assembly complexity while maintaining antenna performance through the continuous conductive path.
Solution Approach 2:
The conductive sheet serves multiple functions simultaneously: it forms the antenna radiating elements, creates the feed network for signal distribution, provides the ground plane for reference potential, and includes mounting features for device integration. This multi-functionality eliminates the need for separate components for each function, significantly reducing manufacturing cost and complexity.
2Adaptability or versatility
If traditional stamped metal elements and flex-circuit assemblies are used, then antenna functionality is achieved, but device complexity and assembly time increase
Solution Approach 1:
The patent integrates the antenna radiating elements, feed network, and ground plane into a single monolithic structure formed from one continuous conductive sheet. This merging reduces the number of discrete components that need to be handled and assembled, thereby reducing assembly complexity and time while preserving all necessary antenna functionalities including multi-band operation and polarization diversity.
Solution Approach 2:
While the overall structure is integrated, the conductive sheet is stamped with distinct patterned regions that function as separate antenna elements, feed lines, and ground planes. This segmentation within integration allows for independent optimization of each functional region while maintaining a simplified single-component assembly process.
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 approach significantly reduces production costs and complexity by simplifying the antenna fabrication process, enabling the creation of low-cost, durable, and multi-band wireless antennas with reduced component count, while maintaining performance and integration with electronic assemblies.
Implementation Method 1
applying a conductive layer to the first carrier sheet
Implementation Method 2
forming one or more antennas or circuits by thermoforming the combined carrier sheets and the conductive layer
Implementation Method 3
formed into three-dimensional structures using vacuum forming
Implementation Method 4
integration with circuit boards through capacitive coupling
Data Source
AI summary
Methods for producing cost effective and reliable antennas and circuits for wireless devices are disclosed. The antennas and circuits are formed by applying a conductive layer to one side of a carrier sheet and attaching a second carrier sheet to encapsulate and protect the conductive layer. The combination of the two carrier sheets and the conductive layer are then formed into one or more three-dimensional antenna structures or circuits in a thermoforming process. This technique enables high volume production of antennas and RF circuits in a fast, reliable, and cost-efficient manner that provides for encapsulation of the conductive layer. The plurality of antennas and circuits formed in this fashion may then be separated by a cutting apparatus to obtain individual devices that are ready for integration into myriad communication devices.