Ferromagnetic NFC Beam Shaping for Printer Interference
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Solution Overview
Problem
RFID systems within confined spaces, such as printer housings, face interference and signal degradation due to metallic components and spatial constraints, leading to attenuated near field interrogation signals that require increased power for activation.
Innovation Solution
A beam shaping NFC device is integrated into the printer, comprising a substrate, ferromagnetic component, and wire coil, which concentrates near field interrogation signals towards a targeted region, reducing interference from metallic surfaces and enhancing signal strength for RFID tags.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the RFID transceiver and RFID transponder are confined within the space of an interior housing, then the device can be integrated into compact equipment, but nearby metallic housing causes interference and degradation of the magnetically sensitive near field patterns
Solution Approach 1:
A ferromagnetic component is introduced as an intermediary element between the wire coil and the metallic housing. This ferromagnetic component acts as a magnetic shield that redirects and contains the magnetic field lines within the near field interrogation region, preventing them from interacting with the metallic housing that causes interference. The ferromagnetic material provides a preferred path for magnetic flux, effectively isolating the RFID system from harmful metallic interference while maintaining compact integration.
2Volume of moving object
If the interior of the housing constrains the spatial arrangement of the RFID transceiver and RFID transponder, then the available space is limited, but the near field interrogation signal becomes attenuated when propagating through the ribbon supply roll
Solution Approach 1:
The ferromagnetic component is strategically positioned and shaped to concentrate and enhance the magnetic field specifically at the near field interrogation region where the RFID tag is located. By creating a localized high-density magnetic field zone at the target location rather than distributing the field uniformly, the system overcomes signal attenuation caused by the ribbon supply roll and spatial constraints, ensuring sufficient field strength reaches the RFID tag despite the confined arrangement.
3Reliability
If more input power is needed for the RFID transceiver to activate the RFID tag due to signal attenuation, then the activation reliability improves, but the energy consumption increases
Solution Approach 1:
The ferromagnetic component converts the potentially harmful effect of signal attenuation into a benefit by actively concentrating and directing the magnetic field energy toward the RFID tag. Instead of allowing the magnetic field to dissipate or be blocked by the ribbon supply roll and housing constraints, the ferromagnetic structure guides and focuses the field lines, ensuring efficient energy transfer to the tag with minimal loss, thereby maintaining high activation reliability at low power consumption.
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 effectively concentrates near field interrogation signals at the RFID tag location, reducing the power required for activation and minimizing signal degradation, even in metallic environments, thereby improving the efficiency and reliability of RFID communication within printers.
Implementation Method 1
The ferromagnetic component may concentrate near field interrogation signals generated by the wire coil toward the near field interrogation region and away from the interior surface of the printer
Implementation Method 2
The wire coil may be disposed around the core portion
Data Source
AI summary
Systems, devices, and related methods for shaping near field interrogation signals are discussed herein. Some embodiments may provide for a printer that includes a housing and a beam shaping near field communication (NFC) device secured with the interior surface. The beam shaping NFC device may include a ferromagnetic component including a core portion and a bottom flange portion. The beam shaping NFC device may further include a wire coil disposed around the core portion. The ferromagnetic component may concentrate near field interrogation signals generated by the wire coil toward a near field interrogation region and away from nearby conductive components, such as the interior surface of the printer.