Wireless Module Antenna Interference Reduction via Dynamic Bandwidth

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Solution Overview

Problem

Interference between multiple wireless antennas in electronic devices, such as Bluetooth and WiFi, is a significant challenge due to overlapping operating channels, leading to reduced throughput and potential damage to wireless communication.

Innovation Solution

A wireless module with a first transceiver module transmitting a synchronization signal to a second transceiver module, allowing the second transceiver module to operate in a time-division mode at a first bandwidth and a frequency-division mode at a second bandwidth, thereby reducing interference by maintaining adaptive throughput based on the status of the first transceiver module.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple wireless antennas operate simultaneously at overlapping frequencies, then communication coverage and functionality are improved, but interference between antennas increases and throughput decreases

Engineering Contradiction:

Improvecommunication coverageVSAvoidantenna interference

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The patent implements dynamic bandwidth adjustment where the second transceiver module adapts its operating bandwidth (20MHz or 40MHz) based on real-time detection of the first transceiver module's status. When the first module is active, the second module dynamically switches to a non-overlapping bandwidth to avoid interference, while maintaining full bandwidth when the first module is inactive.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the operating parameters (bandwidth and frequency) of the second transceiver module based on the synchronization signal received from the first transceiver module. This parameter adjustment allows the system to switch between time-division and frequency-division modes, resolving the interference issue while maintaining communication functionality.

Inventive Principle:

Principle #35Parameter changes

2Object-generated harmful factors

If the second transceiver module operates at a first operating bandwidth in time-division mode, then interference with the first transceiver module is reduced, but throughput is limited compared to full bandwidth operation

Engineering Contradiction:

Improveinterference reductionVSAvoidthroughput

Core Design Contradiction:

Object-generated harmful factorsVSProductivity

Solution Approach 1:

The system dynamically switches between time-division mode (with first operating bandwidth) and frequency-division mode (with second operating bandwidth) based on the availability of the first transceiver module. This dynamic operation ensures high throughput when possible while maintaining interference reduction when necessary.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent employs periodic synchronization signals from the first transceiver module to coordinate the operation of the second transceiver module. This periodic coordination enables the second module to alternately operate in time-division and frequency-division modes, optimizing throughput while preventing interference.

Inventive Principle:

Principle #19Periodic action

3Productivity

If the second transceiver module operates at a second operating bandwidth in frequency-division mode, then throughput is maintained, but channel overlap with the first transceiver module may occur

Engineering Contradiction:

ImprovethroughputVSAvoidchannel overlap

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the frequency parameters of the second transceiver module based on the operating mode. In frequency-division mode, the second module selects a second operating bandwidth that is frequency-separated from the first transceiver module's channel, eliminating overlap while maintaining throughput through parallel frequency operation.

Inventive Principle:

Principle #35Parameter changes

4Object-generated harmful factors

If adaptive throughput control is implemented based on first transceiver module status, then interference is minimized, but system complexity increases due to synchronization and mode switching requirements

Engineering Contradiction:

ImproveinterferenceVSAvoidsynchronization mechanism

Core Design Contradiction:

Object-generated harmful factorsVSDevice complexity

Solution Approach 1:

The patent introduces a synchronization signal as an intermediary mechanism between the two transceiver modules. This simple signal exchange enables the second module to detect the operational status of the first module and adjust its bandwidth accordingly, achieving interference reduction through a minimal complexity synchronization protocol.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10098038B2Wireless module and method of reducing interference between multiple wireless antennas

Publication Date: 2018.10.09 MEDIATEK INC

AI summary

A wireless module with reduced interference between the multiple wireless antennas therein. A synchronization signal is transmitted from a first transceiver module to a second transceiver module and, accordingly, the second transceiver module operates a transmitter of the second transceiver module at a first operating bandwidth in a time-division mode (with respect to the first transceiver module). The second transceiver module further operates the transmitter of the second transceiver module at a second operating bandwidth in a frequency-division mode (with respect to the first transceiver module).