Antenna Array Current Control for RF Tag Location and Flex Board Bending
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Solution Overview
Problem
Existing communication devices using RF tags face challenges in precisely estimating the location of RF tags and efficiently managing power consumption, particularly when multiple antennas are used, and in detecting bending in flexible circuit boards to prevent malfunctions and fires.
Innovation Solution
A communication device with a control unit, power supply unit, and multiple antennas on a flexible circuit board that adjusts current supply to each antenna to optimize detection ranges and minimize overlap, allowing for precise location calculation of RF tags and detection of bending in flexible circuit boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple antennas are activated to improve location estimation accuracy, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the number of active antennas based on the detection range requirements. When a single antenna's detection range is insufficient, additional antennas are activated to improve location estimation accuracy. This dynamic activation strategy ensures that antennas are only powered when needed, optimizing the balance between measurement precision and power consumption
Solution Approach 2:
The system changes the operational parameters of antennas by adjusting their activation state. By controlling whether antennas are active or inactive based on detection needs, the system optimizes both location estimation accuracy and power consumption. The control unit monitors detection range and adjusts antenna activation accordingly
2Measurement precision
If multiple antennas are activated to improve location estimation accuracy, then measurement precision is improved, but signal interference increases
Solution Approach 1:
The system dynamically controls antenna activation to minimize signal interference. By activating only the necessary number of antennas based on detection range requirements, the system achieves accurate location estimation while reducing the potential for signal interference that would occur if all antennas were continuously active
Solution Approach 2:
The control unit monitors the detection range and signal conditions, and adjusts antenna activation accordingly. This feedback mechanism ensures that antennas are activated only when needed for accurate location estimation, thereby minimizing signal interference while maintaining measurement precision
3Adaptability or versatility
If flexible circuit board is bent to adapt to different installation surfaces, then adaptability is improved, but reliability deteriorates due to potential damage
Solution Approach 1:
The system uses a flexible circuit board that can be bent to adapt to different installation surfaces. The flexible board maintains its integrity through proper material selection and design, allowing it to be bent within safe limits while preserving circuit functionality and reliability
Solution Approach 2:
The system includes sensors that detect bending of the flexible circuit board before damage occurs. By monitoring the bending state in advance, the system can take protective measures or alert users to avoid excessive bending, thereby preventing damage and maintaining reliability while still allowing necessary flexibility for installation
Data Source
AI summary
A communication system includes a substrate, a plurality of antennas disposed on the substrate, and a radio frequency (RF) tag. A distance between the RF tag and at least one antenna among the plurality of antennas is detected based on a signal emitted by the RF tag and received by the at least one antenna.