Antenna Sharing for Concurrent Bluetooth and WLAN Reception
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Solution Overview
Problem
Current wireless communication devices face challenges in concurrently receiving Bluetooth and WLAN signals in the same frequency band without degrading performance, as existing methods like time multiplexing reduce throughput and interference cancellation provides limited practical use.
Innovation Solution
A wireless device with a single antenna uses a switching amplification circuit and programmable switches to dynamically route composite signals based on signal strength, employing a secondary path coupling with active or passive devices to manage signal loss and maintain sensitivity, allowing concurrent reception of Bluetooth and WLAN signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If time multiplexing is used to avoid RF signal mixing between Bluetooth and WLAN, then interference is reduced, but throughput is reduced and CPU time is increased
Solution Approach 1:
The patent employs dynamic signal routing through switches that continuously adjust the signal path based on which protocol (Bluetooth or WLAN) has priority at any given moment. This dynamic switching allows concurrent operation without fixed time multiplexing, maintaining throughput while preventing RF signal mixing through active signal path management.
Solution Approach 2:
The patent introduces an intermediary switching mechanism that mediates between Bluetooth and WLAN signals. The switch controller acts as a mediator that routes signals through different paths (direct path or secondary path with coupling) to prevent harmful interference while allowing both protocols to operate simultaneously without the throughput penalties of time multiplexing.
2Volume of moving object
If a single antenna is used for both Bluetooth and WLAN to improve device miniaturization, then device size is reduced, but signal sensitivity is degraded due to interference
Solution Approach 1:
The patent segments the signal path into multiple routes: a direct path and a secondary path with coupling. By dividing the signal flow into separate pathways with different characteristics, the system can route signals appropriately to maintain sensitivity while using a single antenna, thus achieving miniaturization without sacrificing performance.
Solution Approach 2:
The patent changes the coupling parameter dynamically by adjusting the coupling factor between the secondary path components. This parameter change allows the system to optimize signal sensitivity for different protocols and signal conditions, maintaining reliable reception despite using a single antenna for both Bluetooth and WLAN operations.
3Reliability
If interference cancellation methods are used to handle concurrent Bluetooth and WLAN signals, then signal reception is improved, but the method provides only limited practical use
Solution Approach 1:
Instead of trying to cancel interference, the patent converts the potential harm of concurrent signals into a benefit by using the coupling mechanism to deliberately control signal interaction. The coupling path allows controlled signal mixing that can be managed through switching, transforming the interference problem into a controllable signal routing opportunity that works across different protocols and conditions.
Data Source
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AI summary
A wireless device for receiving composite signals is disclosed. The wireless device includes an antenna. The wireless device also includes a first amplifier coupled to the antenna. The wireless device further includes a second amplifier coupled to the antenna. The wireless device also includes a first receiver. The wireless device further includes a second receiver. The wireless device also includes a first switch that couples the first receiver to the output of either the first amplifier or the second amplifier. The wireless device further includes a second switch that couples the second receiver to the output of either the first amplifier or the second amplifier.