Multi-infeed RFID Antenna for Regional Frequency Compatibility
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Solution Overview
Problem
Conventional RFID tag antennas with a single feed point are inadequate for meeting user requirements, particularly in terms of data exchange efficiency and compatibility with different frequency standards across various regions.
Innovation Solution
The design of an ultrahigh frequency RFID tag antenna with multiple infeeds, featuring a radiating element connected to multiple microstrip lines and tag chips with different working bands, forming microstrip feed loops that enhance isolation and enable identification across diverse frequency standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single feed point is used in the RFID tag antenna, then the device complexity is reduced, but the adaptability to different frequency standards and data exchange efficiency deteriorates
Solution Approach 1:
The antenna is divided into multiple independent feed points, each connected to different tag chips with different working bands. This segmentation allows each feed point to operate independently at different frequencies, enabling compatibility with multiple regional standards simultaneously without requiring a completely different antenna structure for each standard.
Solution Approach 2:
The antenna structure is designed to serve multiple functions by incorporating multiple feed points that can support different frequency standards. The same physical antenna structure can simultaneously or alternatively support different working bands through the multi-feed configuration, making it universally applicable across different regional standards.
2Reliability
If a single feed point is used in the RFID tag antenna, then the manufacturing cost is reduced, but the reliability of data exchange deteriorates
Solution Approach 1:
The patent incorporates redundant feed points and tag chips with different working bands as a preventive measure. If one feed point or tag chip fails, the system can continue to operate through the other feed points, providing fault tolerance and ensuring reliable data exchange without complete system failure.
Solution Approach 2:
The system can dynamically switch between different working bands and feed points based on operational conditions. By changing the operating parameters (frequency, active feed point), the system maintains reliable data exchange even when certain components degrade or fail, adapting to changing conditions in real-time.
3Adaptability or versatility
If multiple tag chips with different working bands are incorporated, then the adaptability to regional standards is improved, but the device complexity increases
Solution Approach 1:
Multiple tag chips with different working bands are merged into a single antenna assembly, sharing common structural elements such as the radiating element, substrate, and housing. This combining approach enables multi-frequency support while avoiding the need for separate antenna structures for each frequency standard, thus limiting the increase in overall complexity.
4Reliability
If multiple microstrip feed loops are formed, then the antenna isolation is enhanced, but the manufacturing complexity increases
Solution Approach 1:
The feed network is segmented into multiple independent microstrip feed loops, each isolated from the others through careful electromagnetic design. This segmentation provides electrical isolation between different feed points and tag chips, preventing interference while maintaining a planar structure that can be manufactured using standard PCB techniques.
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 multi-infeed antenna design ensures reliable data exchange and compatibility with different regional frequency standards, allowing continued functionality even if one tag chip fails and enhancing the antenna's isolation and adaptability.
Implementation Method 1
The antenna is used for exchanging data with a reader by transmitting and receiving electromagnetic waves
Implementation Method 2
a radiating element 101, a first microstrip line 102, a second microstrip line 103
Data Source
AI summary
An ultrahigh frequency RFID tag antenna with multi-infeed includes an antenna assembly, a baseboard, and a ground plane. The baseboard is located above the ground plane. The antenna assembly is electrically connected to the ground plane. The antenna assembly includes a radiated element, a number of microstrip lines, and a number of tag chips. Each of the tag chips is connected between each two microstrip lines, thereby a microstrip feed loop is formed by each of the tag chips and the each two microstrip lines.