Periodic Wire Medium Antenna Isolation for Wireless Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wireless charging systems face inefficiencies due to mutual coupling and interference among antennas, which reduces the effectiveness of power transmission and user convenience.
Innovation Solution
The use of a periodic wire medium with isolating components between antennas, creating a gap that reduces mutual coupling and enhances constructive interference for efficient power transmission, while also incorporating distinct current sources and grounding to optimize antenna placement and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If antennas are brought within close proximity on an array for wireless charging, then charging efficiency and power transmission effectiveness are improved, but mutual coupling and interference between antennas increase
Solution Approach 1:
A periodic wire medium structure is introduced as an intermediary between adjacent antennas. This structure acts as a electromagnetic field mediator that allows power transmission while reducing direct coupling between antennas. The periodic structure modifies the electromagnetic environment between antennas, enabling close proximity placement without excessive mutual coupling.
Solution Approach 2:
The periodic wire medium changes the electromagnetic parameters (permittivity, permeability) of the space between antennas. By modifying these parameters periodically, the structure creates a controlled electromagnetic environment that reduces mutual coupling while maintaining efficient power transfer. The periodicity and geometry of the wire medium are optimized to achieve desired coupling reduction.
2Power
If multiple antennas are used in an array for wireless power transmission, then power delivery capability is improved, but coupling effects reduce the effectiveness of power transmission
Solution Approach 1:
The periodic wire medium serves as a mediator that enables multiple antennas to operate in close proximity without excessive interference. It creates a controlled electromagnetic environment that allows high power delivery while maintaining transmission effectiveness by reducing unwanted coupling between adjacent high-power antennas.
Solution Approach 2:
The space between antennas is segmented into periodic units by the wire medium structure. This segmentation creates distinct electromagnetic zones around each antenna, allowing independent control and optimization of each antenna's performance while maintaining overall array effectiveness for high power delivery.
3Speed
If conventional wireless charging systems use close-proximity antennas, then charging speed is improved, but interference increases reducing user convenience
Solution Approach 1:
The periodic wire medium acts as an intermediary that enables fast charging through close-proximity antenna placement while simultaneously reducing interference. This allows the system to achieve high charging speeds without the interference problems that would otherwise reduce user convenience and system reliability.
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 approach results in more efficient and accurate wireless power transmission, increasing the effectiveness and user satisfaction by minimizing interference and maximizing energy delivery to receivers.
Implementation Method 1
the periodic wire medium reduces the mutual coupling between different antennas
Implementation Method 2
the antennas are configured to direct electromagnetic waves toward a wireless power receiver
Implementation Method 3
the electromagnetic waves interfere constructively at a location proximate to the wireless power receiver
Data Source
AI summary
The various embodiments described herein include methods, devices, and systems for reducing mutual coupling between antennas. In one aspect, a wireless charging system includes: (1) two antennas configured to direct electromagnetic waves toward a wireless power receiver such that the electromagnetic waves interfere constructively at the receiver; and (2) a housing structure configured to receive the antennas, including: (a) a metallic base, (b) a first set of isolating components extending upwardly and defining a first region configured to receive a first antenna, and (c) a second set of isolating components extending upwardly and defining a second region configured to receive a second antenna, the second set including at least some isolating components distinct from those in the first set. The first and second sets of isolating components configured to: (i) create a physical gap between the antennas, and (ii) reduce a mutual coupling between the antennas.