Shared Coil Wireless Device Multi-Band Signal Isolation
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Solution Overview
Problem
Electronic devices face limitations in space for antenna modules due to the need to operate in various frequency bands for wireless power and communication, leading to restricted data and power transmission rates.
Innovation Solution
A wireless device with a shared coil that includes multiple loops and reception circuits, where each circuit is configured to receive and block specific frequency bands, using band-stop filters and impedance control to isolate signals and prevent power wastage, allowing for efficient operation across multiple frequency domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antenna modules are included to operate in various frequency bands, then wireless power and signal transmission capability is improved, but device space is insufficient
Solution Approach 1:
The patent combines multiple antenna modules into a single integrated structure that can operate across multiple frequency bands. The antenna module includes a radiating element with multiple arms that can be configured to support both first frequency band (e.g., Sub-6GHz) and second frequency band (e.g., mmWave) operations, thereby reducing the overall space required while maintaining multi-band adaptability.
Solution Approach 2:
The antenna module is designed to perform multiple functions within a single structure. It can simultaneously or alternatively operate in different frequency bands for both wireless communication and wireless power transfer, eliminating the need for separate dedicated antennas for each function and frequency band.
2Productivity
If multiple antenna modules are included for various frequency bands, then data and power transmission rates are improved, but device complexity increases
Solution Approach 1:
The patent merges multiple antenna functions into a single integrated antenna module that can operate across multiple frequency bands. The module includes a radiating element with multiple arms that can be independently or collectively activated to support different frequency bands, thereby maintaining high transmission rates while reducing the number of separate antenna components needed.
Solution Approach 2:
The antenna module incorporates dynamic switching capability that allows it to adaptively select and activate specific arms or configurations based on the required frequency band and operational mode (communication vs. power transfer). This dynamic reconfiguration enables a single module to replace multiple static antenna modules, reducing overall system complexity.
3Reliability
If reception circuits receive all frequency bands through shared coil, then signal reception capability is improved, but power consumption increases due to unwanted signals
Solution Approach 1:
The patent extracts and removes unwanted frequency components from the received signal using band-stop filters in the reception circuits. Each reception circuit is configured with filters that specifically target and eliminate interference from frequency bands that are not currently being used, allowing the circuit to maintain broad reception capability while consuming power only for the active frequency band.
Solution Approach 2:
The reception circuits incorporate dynamic frequency selection and filtering mechanisms that adaptively activate only the necessary frequency bands for current operation. When operating in a specific frequency band, the circuit dynamically suppresses or filters out signals from other bands, thereby maintaining reliable signal reception while minimizing power consumption by processing only relevant frequency components.
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 efficient miniaturization of wireless devices by allowing them to operate in multiple frequency bands without power consumption from unwanted signals, thereby enhancing data and power transmission rates.
Implementation Method 1
a coil that includes a plurality of loops... configured to receive magnetic flux
Implementation Method 2
The first reception circuit may include a band-stop filter (BSF) configured to prevent an inflow of wireless power into the first reception circuit... The second reception circuit may include a band-stop filter (BSF) configured to prevent an inflow of wireless data
Data Source
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AI summary
A wireless device including a coil having loops, a first reception circuit, and a second reception circuit. The first reception circuit is configured to receive a signal of a first frequency band through a portion of the loops and the second reception circuit configured to inhibit the signal of the first frequency band through the loops.