Orthogonal Inductive Antenna Layout for Accurate Positioning Signals
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Solution Overview
Problem
Existing antenna arrangements for inductive power transfer systems face challenges in reliably and accurately generating positioning signals with desired characteristics, often requiring a large number of elements.
Innovation Solution
The proposed antenna arrangement includes a voltage source, two inductive antenna elements with a 90° phase shift, and additional capacitive and resistive elements, allowing for the generation of positioning signals with predetermined phase shifts and orientations, facilitating accurate relative position and orientation determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large number of antenna elements are used to generate positioning signals with desired characteristics, then the measurement precision and reliability improve, but the device complexity increases
Solution Approach 1:
The patent divides the antenna arrangement into two independent inductive antenna elements (first and second elements) with orthogonal orientations. Each element generates a positioning signal with a specific polarization direction, and by combining these segmented signals with a 90° phase shift, the system achieves accurate position and orientation determination without requiring a large number of antenna elements.
Solution Approach 2:
The patent introduces a phase dimension by applying a 90° phase shift between the signals of the two orthogonal antenna elements. This phase difference, combined with the spatial orientation difference, creates a four-dimensional signal space (two spatial dimensions + two phase/polarization dimensions), enabling precise positioning and orientation measurement with only two physical antenna elements instead of requiring more elements in a single plane.
2Measurement precision
If multiple antenna elements are deployed to determine relative position and orientation accurately, then the measurement precision improves, but the ease of manufacture deteriorates
Solution Approach 1:
The antenna arrangement is segmented into two independent inductive antenna elements that can be manufactured separately using standard inductive power transfer components. Each element is oriented orthogonally to the other, allowing for simplified individual manufacturing and assembly processes compared to creating a complex multi-element array, while still achieving accurate relative position and orientation determination.
3Reliability
If traditional antenna arrangements are used for positioning signals, then compatibility with existing systems is maintained, but the reliability of signal generation under external electromagnetic interference deteriorates
Solution Approach 1:
The patent utilizes polarization dimensions by orienting the two inductive antenna elements orthogonally to each other. This creates positioning signals with distinct polarization characteristics that can be differentiated from external electromagnetic interference. The 90° phase shift further distinguishes the intended positioning signals from random interference, enhancing reliability in electromagnetically noisy environments while maintaining compatibility with existing inductive power transfer systems.
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 solution enables robust and accurate determination of relative positions and orientations between antenna arrangements in inductive power transfer systems, using a minimal number of elements and reducing the impact of external electromagnetic fields.
Implementation Method 1
two inductive antenna elements L1, L2 arranged such that a central axis CL1 of the first inductive antenna element L1 and a central axis CL2 of the second inductive antenna element L2 are oriented perpendicular to one another
Data Source
Figure 1~3
Figure 4~6
AI summary
An antenna arrangement and a method for operating an antenna arrangement The invention relates to an antenna arrangement, wherein the antenna arrangement (1) comprises a voltage source (3), a first inductive antenna element (L1), a second inductive antenna element (L2) and at least one capacitive element (C), wherein the voltage source (3) is electrically connected in parallel to a series connection of a first circuit section comprising at least the first inductive antenna element (L1) and a further circuit section comprising a parallel connection of a first subsection of the further circuit section comprising the at least one capacitive element (C) and a further subsection of the further circuit section comprising at least the second inductive antenna element (L2), and a method of operating an antenna arrangement.