Glazing Coupling Electrodes for Compact Antenna Integration
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Solution Overview
Problem
Existing glazing technologies with multiple antennas face challenges in providing an efficient and compact means of electrical connection to external circuits, leading to compromised performance and increased surface contact size, which can obscure vision areas and are more expensive.
Innovation Solution
The solution involves arranging coupling electrodes with a small average distance, typically less than one millimeter, in a meander or spiral shape, adjacent to each other, forming a band-pass filter to achieve low-impedance alternating current coupling, thereby reducing the size of the surface contact and optimizing antenna performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shared coupling electrode is used for multiple antennas, then device complexity is reduced, but antenna performance is compromised due to specific length requirements for each frequency
Solution Approach 1:
The patent divides the coupling system into multiple separate coupling electrodes (first coupling electrode for first antenna, second coupling electrode for second antenna) instead of using a single shared electrode. Each coupling electrode can be independently optimized for its corresponding antenna's frequency requirements, resolving the conflict between device simplicity and performance reliability.
2Adaptability or versatility
If two coupling electrodes are placed at 90 degrees overlapping each other, then multiple antennas are supported, but surface contact size increases making it more expensive and harder to conceal
Solution Approach 1:
The patent transitions from a two-dimensional overlapping arrangement (90-degree crossing) to a three-dimensional stacked arrangement where coupling electrodes are positioned in different layers or planes. This vertical separation allows multiple antennas to be supported without increasing the horizontal surface contact area, reducing cost and improving aesthetics.
3Reliability
If coupling electrode length is optimized for a particular frequency, then alternating current coupling performance is improved, but performance at other frequencies deteriorates
Solution Approach 1:
The patent applies different coupling electrode lengths to different antennas based on their specific frequency requirements. Each coupling electrode is locally optimized for its corresponding antenna's operating frequency, allowing each antenna to achieve optimal performance at its designated frequency while the system as a whole supports multiple frequencies through this differentiated approach.
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 configuration results in improved performance for multiple antennas with a smaller surface contact, allowing for efficient signal transfer and reduced antenna length, meeting automotive glazing standards while maintaining aesthetic and cost considerations.
Implementation Method 1
arranged so that alternating current coupling occurs between their adjacent portions
Implementation Method 2
forming a band-pass filter to achieve low-impedance alternating current coupling
Data Source
AI summary
The invention is a new type of antenna connection which allows two or more antennas to be connected to an external circuit via a small surface contact. Surface contact size is reduced due to the use of coupling electrodes, at least portions of which are laid adjacent to and parallel with each other such that alternating current coupling occurs between them.