Diagonal RFID Strap Pads for Orientation Flexibility
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Solution Overview
Problem
Existing RFID tag antennas require redesign, recalculation, and retuning when switching from wide edge leading (WEL) to narrow edge leading (NEL) orientation, leading to increased time, cost, and effort due to differences in radio-frequency characteristics.
Innovation Solution
The use of unique pad structures for RFID antennas that allow for the same or similar radio-frequency characteristics when mounted in different orientations, such as a pair of electrically connected strap mounting pads extending diagonally, enabling strap attachment at two angles, thereby accommodating both WEL and NEL orientations without requiring additional tuning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFID antennas are designed for WEL orientation, then they achieve optimal RF performance in that orientation, but they require redesign and retuning when converted to NEL orientation
Solution Approach 1:
The patent applies asymmetry by intentionally creating asymmetric pad structures where the first and second pads have different geometries or positions relative to the antenna element. This asymmetric design compensates for the orientation change, allowing the antenna to maintain consistent RF characteristics in both WEL and NEL orientations without requiring redesign.
Solution Approach 2:
The patent utilizes parameter changes by modifying pad dimensions, shapes, or positions to compensate for orientation differences. By adjusting these geometric parameters, the antenna maintains optimal coupling and RF performance whether mounted in WEL or NEL orientation, eliminating the need for retuning.
2Reliability
If strap mounting pads are positioned for optimal WEL orientation coupling, then RF performance is maximized in WEL, but additional tuning is required for NEL orientation
Solution Approach 1:
The patent applies preliminary action by pre-configuring the pad structures during the antenna design phase to accommodate both WEL and NEL orientations. The pads are positioned and dimensioned in advance to provide optimal coupling for either orientation, eliminating the need for time-consuming tuning operations after manufacturing.
3Reliability
If RFID antenna designs are customized for specific orientations, then RF characteristics are optimized, but development cost and effort increase
Solution Approach 1:
The patent applies universality by designing a single pad structure configuration that serves multiple functions - providing optimal RF performance for both WEL and NEL orientations. This multi-functional design eliminates the need for separate customized designs for each orientation, reducing development complexity while maintaining RF optimization.
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 the reuse and repurposing of RFID antennas for both WEL and NEL orientations with minimal changes, reducing the need for redesign and retuning, and maintaining consistent RF performance within acceptable tolerances.
Implementation Method 1
The coupling of the conductors to the antenna can be achieved using a conductive connection, an electric field connection, magnetic connection or a combination of coupling methods
Data Source
AI summary
In some embodiments, a radio frequency identification (RFID) tag system includes a first strap mounting pad of an RFID antenna component, and a second strap mounting pad of the RFID antenna component, the second strap mounting pad being electrically coupled to the first RFID strap mounting pad. At least one of the first strap mounting pad and the second strap mounting pad may extend diagonally with respect to a wide edge direction of the antenna component, thus making the RFID antenna component configured to receive both a strap that is parallel to a wide edge direction of the antenna component and a strap that is perpendicular to a wide edge direction of the antenna component.