Foil Antenna Integrated Adaptation Network
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing antennas for motor vehicles, particularly for LTE, are large and costly due to the need for discrete adaptation components, which limits their compactness and manufacturing efficiency.
Innovation Solution
A film antenna design that replaces discrete adaptation components with integrated film structures, using a folded conductive layer as a capacitor and a conductor loop as an inductor, reducing the number of required copper layers and allowing for a more compact and cost-effective manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If discrete adaptation components (inductors and capacitors) are used in the antenna, then the bandwidth can be increased, but the antenna size and manufacturing complexity increase
Solution Approach 1:
The patent merges the discrete inductor and capacitor components into a single integrated film structure. The conductor loop forms the inductor, while the folded conductive layer creates the capacitor, both embedded within the same film substrate. This integration eliminates the need for separate discrete components, reducing structural complexity while maintaining the bandwidth enhancement function.
Solution Approach 2:
The film structure serves multiple functions simultaneously: it acts as both the inductor (via the conductor loop) and the capacitor (via the folded conductive layer with dielectric), while also serving as the antenna element itself. This multi-functionality reduces the overall component count and simplifies the antenna structure compared to using separate discrete components.
2Reliability
If discrete adaptation components are mounted on the film, then the antenna performance is maintained, but costs and manufacturing time increase
Solution Approach 1:
The adaptation components are merged into the film structure itself, eliminating the need for separate mounting operations. The inductor and capacitor are formed as integral parts of the film during the same manufacturing process, reducing assembly steps and manufacturing time while maintaining antenna performance.
Solution Approach 2:
The patent replaces the mechanical mounting of discrete components with a direct film-based implementation. Instead of physically attaching separate inductors and capacitors to the film substrate, the electrical functions are achieved through conductive patterns and folded layers formed directly on the film, eliminating mechanical assembly operations.
3Reliability
If multiple copper layers are used to implement the capacitor, then the capacitor function is achieved, but the manufacturing cost and process effort increase
Solution Approach 1:
Instead of achieving capacitance through multiple stacked copper layers in the vertical dimension, the patent uses a single copper layer that is folded over itself, creating the second capacitor plate through the folding action. This dimensional transformation from vertical stacking to lateral folding simplifies the manufacturing process while maintaining the capacitor function.
Solution Approach 2:
The patent utilizes the flexibility of the copper layer and film substrate to create the capacitor structure through folding. The thin film can be bent and folded without compromising electrical performance, allowing the second capacitor plate to be formed from the same continuous material layer, reducing manufacturing complexity.
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 solution achieves a significant bandwidth increase and size reduction of the antenna while maintaining performance, reducing costs and standstill times by eliminating the need for discrete components and allowing for flexible implementation.
Implementation Method 1
The capacitor is formed by a second conductive layer that is folded over on itself along a fold line... at least one dielectric being introduced between the first and second conductive layers
Implementation Method 2
An inductor can be implemented by a conductor loop
Data Source
AI summary
A film antenna comprises an antenna element having a first electrically conductive layer and an adaptation network that is formed by a second conductive layer.