Antenna and Coil Integration for Interference-Free Wireless Charging
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Solution Overview
Problem
Existing devices struggle to simultaneously transmit signals and energy to portable electronic terminals with minimal impact on signal quality and in a compact space, particularly in environments like motor vehicles where electromagnetic interference is a concern.
Innovation Solution
A device with a winding structure for generating an electromagnetic field for energy transmission and an antenna structure for signal transmission, where the antenna structure comprises substructures designed to minimize interference between signal and energy transmission, using a damping structure to primarily dampen the electric field while allowing magnetic field transmission, thereby ensuring efficient and interference-free signal and energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless energy transmission is performed simultaneously with wireless signal transmission, then energy can be transmitted to the terminal device without cable connection, but the signal quality is impaired due to electromagnetic interference
Solution Approach 1:
The device is divided into functionally independent modules: a winding structure for energy transmission and an antenna structure for signal transmission. These modules are spatially separated and electrically isolated, allowing simultaneous operation without interference. The winding structure generates electromagnetic fields for inductive charging while the antenna structure handles radio frequency signals independently.
Solution Approach 2:
A damping structure is introduced as an intermediary element between the winding structure and antenna structure. This damping structure selectively attenuates electric field components that could cause interference while allowing magnetic field transmission necessary for energy transfer. The damping structure acts as a filter that mediates the electromagnetic environment to prevent signal degradation.
2Reliability
If separate structures for signal and energy transmission are provided, then interference between signal and energy transmission is reduced, but the device occupies more space
Solution Approach 1:
The damping structure serves multiple functions simultaneously: it acts as part of the antenna structure for signal transmission while also functioning as an electric field shield for the winding structure. This multi-functional design reduces the overall device volume by eliminating the need for separate shielding components while maintaining signal quality and energy transmission capability.
Solution Approach 2:
The antenna structure is designed to perform dual functions: receiving and transmitting radio frequency signals while also serving as an electromagnetic shield. The damping structure integrated into the antenna assembly provides both signal radiation/ reception capabilities and electromagnetic interference protection, reducing the total component count and device footprint.
3Volume of moving object
If the antenna structure is placed close to the winding structure, then device space is minimized, but electromagnetic interference between the two structures increases
Solution Approach 1:
The damping structure is positioned between the winding structure and antenna structure, acting as an intermediary that selectively filters electromagnetic fields. It allows magnetic field penetration necessary for inductive energy transfer while attenuating electric field components that would cause interference. This enables close proximity placement of the structures without sacrificing signal quality.
Solution Approach 2:
The damping structure is strategically positioned in specific regions where electric field interference would be most problematic, while maintaining open paths for magnetic field transmission. The selective placement and design of damping elements create localized field management that permits compact integration without compromising either energy transfer or signal quality.
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 enables simultaneous signal and energy transmission with improved quality and minimal spatial requirements, adhering to electromagnetic compatibility guidelines, particularly in automotive environments by effectively shielding electric field interference while maintaining magnetic field integrity.
Implementation Method 1
electrical energy can be transmitted inductively to the terminal device, as a result of which the energy store of the terminal device can be charged
Implementation Method 2
wireless communication between a terminal device and other devices, e.g. via a radio link
Implementation Method 3
The device has a damping structure for damping the electric field of the winding structure
Data Source
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AI summary
The invention relates to a method and a to device for combined signal transmission or for combined signal transmission and energy transmission, in particular to a portable electronic terminal, wherein the device comprises at least one coil structure for producing a first electromagnetic field for energy transmission or for signal transmission, wherein the device also comprises at least one antenna structure for additional signal transmission, wherein the antenna structure comprises a first partial structure and a second partial structure, wherein the first partial structure is designed and/or is arranged in relation to the second partial structure in such a way that signals in a first frequency range can be received and transmitted by means of the antenna structure, wherein at least the first partial structure is arranged adjacent to the at least one coil structure in a projection plane oriented perpendicular to a central axis of the coil structure.