PCB Antenna Integration for RFID Tag Miniaturization
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Solution Overview
Problem
Conventional RFID tags are too large to be used on individual items due to the size of the internal antenna, making it difficult and costly to track small components like memory modules, processor chips, and graphics cards, as they cannot accommodate the necessary surface area for the tag or justify the cost of tagging.
Innovation Solution
A printed circuit board (PCB) with an external RF antenna is used to support an RFID chip, allowing for smaller RFID chip sizes and reducing costs by eliminating the need for an internal antenna, enabling tracking of individual items without significant additional expense.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional RFID tags with internal antennas are used, then tracking capability is achieved, but the tag size becomes too large for individual items
Solution Approach 1:
The RFID system is segmented into two separate components: the RFID chip (transponder) and the antenna. The antenna is integrated into the PCB while the RFID chip is mounted separately on the PCB surface, allowing the tag functionality to be achieved without requiring a large internal antenna within the tag itself.
Solution Approach 2:
The antenna function is merged with the PCB structure by incorporating an RF antenna directly into the circuit board. This combines the antenna function with an existing component of the item being tracked, eliminating the need for a separate large antenna structure in the RFID tag.
2Reliability
If RFID tags are provided on individual items, then individual tracking is enabled, but the cost increases significantly
Solution Approach 1:
The PCB serves multiple functions: it acts as both the electronic circuit board for the device and the mounting platform for the RFID tracking system. The antenna integrated into the PCB serves dual purposes for RF communication and as part of the device's electrical infrastructure, reducing overall system cost.
Solution Approach 2:
The PCB structure itself provides the antenna function, eliminating the need for separate antenna components. This self-service approach where the existing PCB structure fulfills the antenna requirement reduces component count and manufacturing cost.
3Ease of operation
If large internal antennas are included in RFID tags, then reading distance is improved, but the tag cannot fit on individual goods
Solution Approach 1:
The antenna is moved from being embedded within the tag (three-dimensional constraint) to being planar on the PCB surface (two-dimensional solution). This dimensional change allows the antenna to achieve adequate size for reading distance while utilizing the extended PCB surface area rather than confining it to the tag's limited volume.
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
This solution allows for the tracking of individual items and reduces the overall cost of tagging, as the RFID chip can be integrated onto PCBs without the need for a large internal antenna, making it feasible to tag both individual goods and larger items like palettes.
Implementation Method 1
the RFID reader includes a transmitter that outputs radio frequency (RF) signals through an antenna to create an electromagnetic field
Data Source
AI summary
A printed circuit board (PCB) includes an antenna for an RFID chip. An RFID chip for a tag is operable to be placed on the PCB such that the RFID chip is connected to the antenna and is operable to use the antenna to transmit data.