Heated Vehicle Window Busbar Reflector for Transponder Signal Gain
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Solution Overview
Problem
Existing vehicle window transponders face challenges with unreliable communication due to signal reflection, absorption, and shielding, leading to inadequate reading results in road traffic scenarios.
Innovation Solution
A vehicle window with an integrated transponder system comprising an electrically conductive functional component, busbars, and a reflector formed by one of the busbars, which enhances antenna gain by bundling radiation, increasing the range and sensitivity of the transponder for improved communication with external readers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard transponder is used in a vehicle window, then the device complexity is low, but the communication reliability is insufficient due to signal reflection, absorption, and shielding
Solution Approach 1:
The patent introduces a reflector as an intermediary component between the transponder antenna and the external environment. This reflector mediates the electromagnetic signal transmission by reflecting signals toward the antenna, thereby improving communication reliability without requiring changes to the transponder itself. The reflector acts as a passive intermediary that enhances signal strength through geometric reflection rather than active signal processing.
Solution Approach 2:
The patent addresses signal reliability issues by adding a spatial dimension solution - the reflector is positioned at a specific distance and angle relative to the antenna. This three-dimensional arrangement creates an optimized signal path that overcomes the two-dimensional planar limitations of standard transponder installations in vehicle windows, allowing signals to bypass obstructions and reflections from other window components.
2Reliability
If the transponder signal strength is increased to overcome shielding and absorption, then the communication reliability improves, but the energy consumption increases
Solution Approach 1:
The patent converts the harmful effect of electromagnetic signal loss (due to shielding and absorption by vehicle window materials) into a beneficial effect by using a passive reflector. Instead of actively amplifying signals (which would consume energy), the system uses the reflector to redirect and concentrate existing signal energy, effectively converting signal attenuation problems into focused signal transmission advantages through geometric reflection.
3Reliability
If a reflector is added to increase antenna gain, then the communication range and reliability improve, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent employs a reflector that can be manufactured as a simple, inexpensive component - potentially using basic metallic materials or even conductive coatings. The reflector is designed as a straightforward geometric structure rather than a complex assembly, allowing for easy integration into vehicle window manufacturing processes. This approach prioritizes manufacturing simplicity and cost-effectiveness over using premium, complex components.
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 significantly improves communication quality by amplifying the antenna gain, allowing the transponder to be detected from greater distances and enhancing reliability in vehicle identification systems.
Implementation Method 1
the reflector (5) associated with and spaced apart from the transponder (2) and provided for increasing an antenna gain of the antenna
Implementation Method 2
a reflector (5) associated with and spaced apart from the transponder (2) and provided for increasing an antenna gain of the antenna
Implementation Method 3
The electrically conductive functional component (4) is electrically conductively connected to the busbars (3) such that when an electrical voltage is applied to the busbars (3), a current can flow through the electrically conductive functional component (4)
Data Source
AI summary
A vehicle window includes a glass pane, an electrically conductive functional component, at least two busbars, wherein the electrically conductive functional component is electrically conductively connected to the busbars such that when an electrical voltage is applied to the busbars, a current can flow through the electrically conductive functional component, a transponder having an antenna and a control unit for communicating with a reader, wherein the control unit includes a memory for storing identification data, wherein a reflector is associated with and spaced apart from the transponder for increasing an antenna gain of the antenna, wherein the reflector is formed at least partially by one of the two busbars.