RFID Tag Antenna Deactivation Switch for Signal Interference
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Solution Overview
Problem
Signal interference occurs when proximate electronic devices transmit or receive signals at similar frequencies, disrupting desired signals in a growing number of wirelessly communicating devices.
Innovation Solution
A system comprising a passive RFID tag, an antenna, and a switch that connects them, where the switch opens when an electronic device is activated, preventing communication between the RFID tag and antenna to avoid interference, and closes when the device is deactivated to enable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RFID tag continuously transmits signals, then the RFID communication function is maintained, but signal interference occurs with proximate electronic devices operating at similar frequencies
Solution Approach 1:
The patent implements a dynamic switching mechanism that adjusts the RFID antenna's operational state based on the presence and activity status of proximate electronic devices. The switch transitions between closed (RFID active) and open (RFID inactive) states, allowing the system to adapt its transmission behavior to environmental conditions and eliminate interference with devices operating at similar frequencies.
Solution Approach 2:
The patent introduces a switch as an intermediary component between the RFID tag circuitry and the antenna. This intermediary element controls the coupling between the RFID circuit and the antenna, enabling the system to isolate the RFID components from the antenna when interference is detected, thereby preventing harmful signal interactions while maintaining RFID functionality when safe.
2Object-affected harmful factors
If the switch opens to prevent interference, then signal interference is reduced, but RFID communication is interrupted
Solution Approach 1:
The patent implements periodic monitoring of the electromagnetic environment to determine when the switch should transition between states. The system continuously or periodically detects the presence and operational state of proximate electronic devices, adjusting the RFID antenna coupling accordingly. This periodic action ensures RFID communication resumes when interference conditions cease, maintaining communication continuity while preventing interference during problematic periods.
Data Source
AI summary
A system, device, and method are disclosed for reducing or eliminating interference between proximate electronic devices. The system, device, and method rely on a switch communicatively disposed between a signal origination device and an antenna. Further, the switch is connected to an electronic device and is operable to receive a signal from the electronic device corresponding to whether the electronic device is in an activated or de-activated state. Additionally, when the electronic device is in an activated state, the switch is operable to open, preventing communication between the signal origination device and the antenna.