Dual-Purpose Tracker Tag Antenna Using Housing and Piezo Plates
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Solution Overview
Problem
Conventional tracker tags face challenges in designing efficient antennas due to their small size, which limits performance and requires significant space, especially for high-frequency communication like Bluetooth and Ultra-Wideband, and existing solutions often result in degraded antenna efficiency.
Innovation Solution
The tracker tags incorporate existing components such as the housing covers and a piezoelectric device as dual-purpose antennas, utilizing conductive plates and RF circuitry for both Bluetooth and Ultra-Wideband communication, with matching circuits and a diplexer to enable efficient signal transmission without additional dedicated antenna structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated antenna structures are used for Bluetooth and Ultra-Wideband communication, then communication performance is improved, but device size and volume increase
Solution Approach 1:
The piezoelectric device's conductive plates are designed to serve dual purposes: maintaining their primary piezoelectric function for haptic feedback while simultaneously acting as antennas for both Bluetooth and Ultra-Wideband communication. This multi-functionality eliminates the need for separate antenna structures, reducing device volume while maintaining communication performance
Solution Approach 2:
The patent combines the antenna function with the existing piezoelectric device structure by making the conductive plates serve both roles. The front and back conductive plates of the piezoelectric device are integrated with the housing covers to form functional antenna elements, merging two separate functions into a single component
2Volume of moving object
If antenna volume is reduced to maintain small device size, then device portability is improved, but antenna efficiency deteriorates
Solution Approach 1:
The patent optimizes the local electrical properties of the piezoelectric device's conductive plates by adjusting their geometry, position, and electrical connection to maximize antenna efficiency within the constrained volume. The conductive plates are strategically positioned and dimensioned to achieve resonant frequencies matching Bluetooth and Ultra-Wideband bands, maintaining efficiency despite small size
Solution Approach 2:
The patent changes the electrical parameters of the antenna system by utilizing the piezoelectric material's inherent electrical properties and adjusting the conductive plate dimensions, spacing, and grounding configuration to optimize impedance matching and radiation efficiency for high-frequency communication
3Adaptability or versatility
If separate antennas are provided for Bluetooth and Ultra-Wideband communication, then communication versatility is improved, but device complexity increases
Solution Approach 1:
The piezoelectric device's conductive plates are designed to support multiple communication protocols (Bluetooth and Ultra-Wideband) simultaneously through proper impedance matching and resonance design, eliminating the need for separate antenna systems and reducing overall device complexity
Solution Approach 2:
The patent employs a diplexer device that dynamically routes different frequency bands to the appropriate antenna elements based on the communication protocol being used, allowing a single antenna structure to serve multiple communication functions efficiently
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
This approach allows for compact tracker tags to maintain efficient communication performance across both Bluetooth and Ultra-Wideband frequencies, reducing power consumption and enabling accurate location tracking with a small form factor.
Implementation Method 1
a piezoelectric device having a first conductive plate and a second conductive plate. In operation, the RF circuitry utilizes at least one of the front cover, the back cover, the first conductive plate, and the second conductive plate as one or more antennas
Data Source
AI summary
Tracker tags, smart tags, locator tags, and the like are provided. A portable tracker device, according to one implementation, includes a housing having a front cover and a back cover. The portable tracker device also includes Radio Frequency (RF) circuitry configured to operate within at least one of a Bluetooth (BT) frequency range and an Ultra-Wideband (UWB) frequency range. Also, the portable tracker device includes a piezoelectric device having a first conductive plate and a second conductive plate. The RF circuitry utilizes at least one of the front cover, the back cover, the first conductive plate, and the second conductive plate as one or more antennas.