Inductive Antenna Circuit for Phase-Shifted 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 and being susceptible to external electromagnetic fields.
Innovation Solution
An antenna arrangement comprising a voltage source, inductive antenna elements, capacitive elements, and optional resistive and compensating inductive elements, configured to generate positioning signals with a predetermined phase shift, allowing robust and accurate determination of relative position and orientation between primary and secondary units, while minimizing the number of elements and reducing external interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing antenna arrangements are used to generate positioning signals, then positioning functionality is provided, but the number of elements required is large and reliability is reduced due to susceptibility to external electromagnetic fields
Solution Approach 1:
The patent combines multiple antenna elements into a single integrated antenna structure that generates positioning signals with predetermined phase shifts. Instead of using separate antenna elements for different signal components, the invention merges them into one unified structure that produces the necessary phase-shifted signals through its internal configuration, thereby reducing the total number of elements while maintaining reliability
Solution Approach 2:
The single antenna structure is designed to perform multiple functions simultaneously: it generates positioning signals with different phase shifts, provides resistance to external electromagnetic fields, and enables accurate relative position determination. This multi-functional design eliminates the need for multiple specialized antenna elements, reducing device complexity while improving reliability
2Measurement precision
If multiple antenna elements are used to generate positioning signals with predetermined phase shift, then accurate position determination is achieved, but device complexity increases
Solution Approach 1:
The patent merges multiple antenna elements into a single integrated structure that internally generates the necessary phase-shifted signals. This single antenna produces multiple signal components with predetermined phase shifts through its design, eliminating the need for multiple separate elements while maintaining the measurement precision required for accurate position determination
Solution Approach 2:
The invention changes the approach from using multiple physical antenna elements to using a single antenna with variable phase shift capability. By manipulating the phase shift parameter within the single antenna structure, the system achieves accurate position determination without increasing device complexity
3Reliability
If conventional antenna arrangements are used, then signal generation is possible, but susceptibility to external electromagnetic fields reduces reliability
Solution Approach 1:
The patent combines multiple antenna elements into a single integrated structure that inherently provides resistance to external electromagnetic fields. This unified design reduces the overall complexity while improving reliability by eliminating the susceptibility issues associated with multiple separate elements
Solution Approach 2:
The invention converts the potential harm of external electromagnetic fields into a benefit by designing the single antenna structure to be inherently resistant to such interference. The unified design naturally rejects external fields while maintaining signal generation capability, turning a reliability challenge into a design advantage
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 proposed antenna arrangement enables efficient and accurate generation of positioning signals with a small number of elements, providing robust and precise determination of relative position and orientation, and is resistant to external electromagnetic fields, thus enhancing the reliability of inductive power transfer systems.
Implementation Method 1
An antenna arrangement (1) comprising a voltage source (3), a first inductive antenna element (L1) arranged in a first circuit section, and a further inductive antenna element (L2) arranged in a further circuit section
Implementation Method 2
wherein the further circuit section comprises a parallel connection of a first subsection (10) and a second subsection (11), wherein the first subsection (10) comprises a capacitive element (C)
Data Source
AI summary
The invention relates to an antenna arrangement, wherein the antenna arrangement comprises a voltage source, a first inductive antenna element, a second inductive antenna element and at least one capacitive element, wherein the voltage source is electrically connected in parallel to a series connection of a first circuit section comprising at least the first inductive antenna element 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 and a further subsection of the further circuit section comprising at least the second inductive antenna element, and a method of operating an antenna arrangement.