Multi-Antenna Wearable RFID for Body Interference and Range
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
RFID tags in wearable articles, such as shoes, face significant challenges in maintaining effective wireless communication due to interference from human bodies and environmental surfaces, limiting their range and effectiveness in integrated wireless environments like stores and entertainment complexes.
Innovation Solution
A wearable article with multiple antennas, including a UHF antenna tuned for communication through air and a body-tuned UHF antenna, along with a HF/NFC antenna, is designed to enhance communication by actively or passively coordinating with a single transmitter circuit, allowing effective data transfer and personalized interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single UHF RFID antenna is used in wearable articles, then the device complexity is low, but the wireless communication reliability deteriorates due to interference from human bodies and environmental surfaces
Solution Approach 1:
The patent divides the single antenna system into multiple segmented antenna elements (first UHF antenna and second UHF antenna) that operate at different frequencies. This segmentation allows each antenna to be optimized for specific communication scenarios - one for general RFID tracking and another for body-tuned communication - thereby improving overall wireless communication reliability without requiring a complete system redesign
Solution Approach 2:
The patent changes the operating frequency parameter of the antenna system by implementing two distinct UHF frequencies. This parameter differentiation enables the system to overcome interference issues by selecting appropriate frequency bands based on the communication environment - using one frequency when the body is present and another when it is absent, thus resolving the reliability-complexity contradiction
2Length of moving object
If the RFID tag is tuned for communication through air, then the communication range is extended, but the communication effectiveness deteriorates when worn on the body due to body interference
Solution Approach 1:
The patent implements a dynamic antenna selection mechanism that automatically switches between the first and second UHF antennas based on whether a human body is detected in proximity. When the body is present, the system dynamically transitions to the body-tuned antenna optimized for penetrating human tissue, thereby maintaining communication effectiveness across varying operational conditions without sacrificing communication range
3Adaptability or versatility
If multiple antennas are added to support different communication modalities, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The patent designs the multi-antenna system with a universal transceiver architecture that can operate across multiple UHF frequencies and support different communication modalities (RFID tracking, body-tuned communication, location-specific interactions) through a single integrated controller. This universal design approach enables the system to perform multiple functions without proportionally increasing complexity, as the same hardware platform is configured differently based on operational requirements
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 ensures reliable wireless communication and personalized experiences by maintaining effective transmission ranges despite being worn on the body, enabling location-specific and general interactions within integrated environments.
Implementation Method 1
a first antenna, positioned with respect to the structure, tuned to communicate, while the article of apparel is being worn, according to a first wireless communication modality with a first external antenna
Implementation Method 2
a second antenna, positioned with respect to the structure, tuned to communicate according to a second wireless communication modality with a second external antenna different than the first external antenna
Data Source
AI summary
A wearable article, system, and methods may include a structure configured to enclose a human body part. A first antenna, positioned with respect to the structure, is tuned to communicate, while the wearable article is being worn, according to a first wireless communication modality with a first external antenna. A second antenna, positioned with respect to the structure, is tuned to communicate according to a second wireless communication modality with a second external antenna different than the first external antenna, the second communication modality being different than the first communication modality. A transceiver, coupled to at least one of the first antenna and the second antenna, is configured to communicate via one of the first and second antennas based, at least in part, on the one of the first and second antennas coming into wireless communication contact with a corresponding one of the first and second external antennas.