RFID Chip Antenna Switching for Mobile Device Identification
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Solution Overview
Problem
Existing mobile communication devices face challenges in quickly and automatically identifying manufacturing and configuration information, especially when devices are not turned on or have non-removable batteries, making it difficult for customer service environments and inventory management.
Innovation Solution
Integration of a radio frequency identity (RFID) chip with a motherboard, utilizing an antenna switch to selectably couple antennas to the RFID chip based on the device's activation state and power levels, allowing for wireless read and write access, and incorporating a power dissipation filter to manage induced power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If RFID chip is integrated into mobile communication device, then information retrieval speed is improved, but device complexity increases
Solution Approach 1:
The RFID chip is integrated directly into the motherboard of the mobile communication device, merging the RFID functionality with the existing device structure. This eliminates the need for separate RFID readers and antennas, reducing overall system complexity while enabling rapid information retrieval through the communication bus.
Solution Approach 2:
The RFID chip leverages existing device components (motherboard communication bus, integrated antennas) to serve multiple functions: storing device information, enabling rapid identification, and providing wireless communication capabilities. This multi-functionality approach reduces the need for additional dedicated components.
2Ease of operation
If antenna is coupled to RFID chip for wireless read access, then ease of operation is improved, but power dissipation increases
Solution Approach 1:
The system employs an antenna switch that dynamically couples antennas to the RFID chip based on operational requirements. The antenna is only connected when wireless read or write operations are needed, and disconnected otherwise, thereby enabling convenient wireless access while minimizing unnecessary power dissipation during idle periods.
3Power
If induced power level exceeds threshold, then RFID chip operation is improved, but harmful effects increase
Solution Approach 1:
The system continuously monitors the induced power level delivered to the RFID chip and provides feedback control. When the power level exceeds a predetermined threshold, the antenna switch automatically decouples the antenna from the RFID chip, preventing excessive power from causing harmful effects such as overheating or damage to the chip.
4Use of energy by moving object
If device is turned off or battery depleted, then energy consumption is reduced, but information accessibility worsens
Solution Approach 1:
The RFID chip is designed to be passively powered by electromagnetic fields from external readers or from the device's own antennas when activated. This allows the chip to provide information about the device's state (powered or unpowered) without requiring the main device battery to be active, enabling information accessibility independent of the device's power state.
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 efficient and automatic retrieval of device information without the need for manual input, even when devices are off or batteries are depleted, enhancing customer service and inventory management efficiency.
Implementation Method 1
RFID chips are small and inexpensive devices that typically draw power from an incident radio frequency field that may be radiated by a scanning device that reads the information that the RFID chip transmits
Implementation Method 2
an antenna switch to selectably couple one of the antennas to the RFID chip and an application that selects the antenna switch to couple one of the antennas to the RFID chip based on a state of the mobile communication device
Implementation Method 3
a power dissipation filter and an application that selects the antenna switch to couple the antenna to the power dissipation filter when an induced power level delivered to the RFID chip exceeds a pre-defined threshold
Data Source
AI summary
A mobile communication device. The mobile communication device comprises a motherboard comprising a communication bus, a cellular radio frequency transceiver connected to the communication bus, a plurality of antennas, at least one of the antennas communicatively coupled to the cellular radio frequency transceiver, and a processor connected to the communication bus. The mobile communication device further comprises a radio frequency identity (RFID) chip connected to the communication bus, wherein the RFID chip comprises a memory, provides wireless read access to the memory, and provides write access to the memory to the communication bus. The mobile communication device further comprises an antenna switch to selectably couple at least one of the antennas to the RFID chip and an application that selects the antenna switch to couple one of the antennas to the RFID chip based on a state of the mobile communication device.