Passive Wireless Switch Using UWB Transponder
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Solution Overview
Problem
Conventional wireless switches and sensors face issues with multipath and sensor collisions due to their reliance on narrowband RFID and transducer approaches, which are inefficient and impractical for mobile and home environments.
Innovation Solution
A wireless switch and sensor system utilizing a passive ultra wideband (UWB) RFID transponder that generates power from a narrowband RF signal to transmit UWB pulses, enabling robust collision avoidance and extended range performance with low power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If narrowband RFID or transducer approaches are used for wireless switches and sensors, then wireless operation is achieved, but multipath and sensor collisions occur reducing reliability
Solution Approach 1:
The patent changes the frequency parameter from narrowband to ultra-wideband (UWB), expanding the operational bandwidth from a narrow frequency range to a wide spectrum. This parameter change fundamentally alters how signals propagate and are detected, enabling the system to avoid multipath interference and sensor collisions that plague narrowband systems, thereby resolving the reliability contradiction
2Reliability
If copper wiring is used for switch and sensor connections, then stable electrical connection is achieved, but cost and weight increase
Solution Approach 1:
The patent replaces the mechanical copper wiring system with an electromagnetic field-based wireless communication system. Instead of physical electrical connections through copper conductors, the system uses UWB radio frequency signals to transmit data and power, eliminating the need for heavy wiring while maintaining connection stability and enabling mobile applications
3Use of energy by moving object
If narrowband RF signals are used to power wireless switches, then power transmission is achieved, but power consumption efficiency deteriorates
Solution Approach 1:
The patent changes the RF signal bandwidth parameter from narrowband to ultra-wideband, which fundamentally improves power transmission efficiency. The UWB signals distribute energy across a wide frequency spectrum, reducing peak power requirements and minimizing energy loss during transmission and reception, thereby resolving the power efficiency contradiction
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 UWB RFID transponder system provides a cost-effective, low-power solution for wireless switches and sensors, offering improved robustness and range while reducing the need for costly and heavy copper wiring, allowing for flexible placement in various environments.
Implementation Method 1
a narrowband receiver operable to generate power from a received narrowband RF signal
Implementation Method 2
an ultra wideband (UWB) transmitter operable to transmit UWB pulses using the generated power
Data Source
AI summary
A wireless switch or sensor is provided that includes a radio frequency (RF) transponder including a narrowband receiver operable to generate power from a received narrowband RF signal and an ultra wideband (UWB) transmitter operable to transmit UWB pulses using the generated power.