RFID Transponder Antenna Ground Plane Edge Extension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Some RFID transponders with a solid ground plane structure isolate the antenna from the reader antenna of RFID printer-encoders, preventing encoding due to the ground plane acting as a barrier to radiation coupling.
Innovation Solution
Incorporating a near field communication section that extends over the edge of the ground plane, allowing for effective coupling with RFID printer-encoders without the need for a separate secondary antenna, and optionally using a dielectric spacer layer between the antenna and ground plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a solid ground plane is used in the RFID transponder antenna, then the structural integrity and shielding performance are improved, but the coupling capability with reader antennas positioned below the ground plane deteriorates
Solution Approach 1:
The radiating element is segmented into two functional parts: a first section positioned above the ground plane for primary radiation, and a second section (near field communication section) extending below the ground plane for near field communication. This segmentation allows the antenna to maintain the solid ground plane structure while enabling coupling with reader antennas positioned below the ground plane through the extending second section.
2Object-affected harmful factors
If a solid ground plane is used in the RFID transponder antenna, then the shielding performance is improved, but the near field communication capability through the ground plane deteriorates
Solution Approach 1:
The radiating element transitions from a two-dimensional planar structure above the ground plane to a three-dimensional structure that extends through the ground plane. The second section of the radiating element penetrates below the ground plane, creating a dimensional transition that enables near field communication through the ground plane while maintaining its shielding properties.
3Adaptability or versatility
If a separate secondary antenna is added for near field communication, then the near field communication capability is improved, but the device complexity increases
Solution Approach 1:
The radiating element is designed to perform multiple functions: the first section provides primary radiation above the ground plane, while the second section (near field communication section) enables near field communication below the ground plane. This multi-functional design eliminates the need for a separate secondary antenna, reducing device complexity while maintaining near field communication capability.
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
Enables encoding of RFID transponders in most printers, including those with reader antennas positioned below the ground plane, enhancing encoding capabilities and simplifying production processes.
Implementation Method 1
the radiating element comprising a near field communication section extending over the edge of the ground plane for enabling near field communication of the antenna by the ground plane from backside of the RFID transponder
Implementation Method 2
a spacer layer made of a dielectric material is arranged between the antenna element and the ground plane
Data Source
AI summary
An RFID transponder, comprising an antenna, comprising a radiating element an IC, and a ground plane arranged under the radiating element, the ground plane being solid without openings. The radiating element comprises a near field communication section extending over the edge of the ground plane for enabling near field communication of the antenna by the ground plane from backside of the RFID transponder.