Multi-Coil Transponder Antenna for Directional Signal Reception
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Solution Overview
Problem
Transponders with single coils experience directional effects, leading to reduced signal reception when the coil axis is not aligned with the query device, resulting in minimum signal levels and potential damage from high voltage interference.
Innovation Solution
A transponder design featuring multiple coils with non-parallel axes, each with a voltage limiter and full-wave rectifier, generating current signals that are compared to determine the most favorably aligned coil for signal reception, while a voltage limiter and smoothing circuit ensure stable supply voltage and prevent damage from high voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single coil is used as antenna, then the device complexity is reduced, but the signal reception becomes dependent on directional alignment causing incoming minimum levels
Solution Approach 1:
The patent divides the single coil antenna into multiple coils (at least two) with different spatial orientations. Each coil is configured with its axis aligned differently in space, so that at least one coil will be favorably aligned regardless of the transponder's position relative to the query device, ensuring continuous reliable signal reception.
Solution Approach 2:
The patent introduces spatial dimensionality by orienting multiple coils along different axes (e.g., x-axis, y-axis, z-axis). This multi-dimensional arrangement ensures that the transponder can receive signals effectively from any direction, overcoming the limitation of single-directional coil alignment.
2Reliability
If multiple coils with different alignments are used, then signal reception reliability is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple coils into a single integrated antenna system. The evaluation unit processes signals from all coils and determines which coil received the strongest signal, then uses that coil for communication. This merging approach maintains reliability while managing complexity through unified signal processing.
Solution Approach 2:
The transponder automatically evaluates signals from multiple coils and selects the most favorable one for communication without external intervention. The evaluation unit continuously monitors incoming signals and dynamically chooses the optimal coil, making the system self-adjusting and reducing the need for external control mechanisms.
3Object-affected harmful factors
If voltage limiter means are added to protect against high voltages, then component protection is improved, but the device complexity increases
Solution Approach 1:
The patent incorporates voltage limiter means in advance of potential voltage damage. These limiters are pre-installed in the signal processing circuitry to clamp or restrict voltage levels before they can reach components that would be damaged by high voltages, providing proactive protection rather than reactive measures.
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
Ensures reliable signal reception independent of position and orientation, with the ability to detect the most energy-efficient coil alignment and maintain stable voltage levels, reducing directional effects and protecting components from high voltage interference.
Implementation Method 1
Coils, in particular cylinder-shaped coils, can generally be used as antennas for receiving wireless electromagnetic signals, and wherein they essentially respond to the magnetic component of the field converting it to a wired electrical signal
Data Source
AI summary
A transponder for receiving a wireless electromagnetic query signal and for transmitting a wireless electromagnetic response signal with a coil acting as a first antenna for generating a first wired electrical incoming signal from the query signal and with at least one further coil acting as an antenna for generating a further wired electrical incoming signal from the query signal, and wherein an axis of the first coil and an axis of the further coil are differently aligned in space, and wherein the coils are assigned at least one means for limiting the voltage of the respective incoming signals, and wherein the incoming signals are routed, respectively, via a first full-wave rectifier for generating a rectified incoming signal, and wherein the rectified incoming signals are routed, respectively, to a current-controlled source of current for generating a current signal that corresponds to the respective incoming signal, and wherein the current signals are routed, respectively, to a peak value of current detector for generating a peak value of current signal, and wherein the peak value of current signals are routed to a comparison arrangement for comparing the generated peak value of current signals, and wherein the comparison arrangement is configured for generating a control signal that indicates the strongest peak value of current signal of the generated peak value of current signals.