Dielectric-Coupled Patch Antenna for RTLS Multipath Precision
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Solution Overview
Problem
Conventional antenna systems for real-time location systems (RTLS) fail to effectively counter multipath environments due to limitations in bandwidth, efficiency, and compactness, making them inadequate for precise location determination of remote devices.
Innovation Solution
A system utilizing an antenna coupled with a dielectric having a dielectric constant between 3 and 40, which provides polarization diversity and includes termination elements and Baluns to enhance bandwidth, allowing for precise location determination of portable devices relative to an object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antenna types are used for RTLS, then device complexity is reduced, but bandwidth and spectral performance are insufficient to meet target specifications
Solution Approach 1:
The patent employs a composite antenna structure integrating a patch antenna element with a dielectric resonator. The dielectric material (with permittivity between 3 and 40) is coupled to the patch antenna, creating a composite system that leverages both components' advantages to achieve enhanced spectral performance and bandwidth while maintaining practical device complexity
Solution Approach 2:
The antenna system is designed to provide multiple functions within a single construction: it serves as both a radiating element and a bandwidth-extending structure. The dielectric-coupled patch antenna configuration enables the system to achieve both compactness and improved spectral performance across multiple frequency bands, including 2.4 GHz and 5.8 GHz ISM bands
2Volume of moving object
If antenna size is reduced for compactness, then ease of operation is improved, but spectral performance and bandwidth are compromised
Solution Approach 1:
The patent utilizes changes in dielectric parameters (permittivity between 3 and 40) to achieve compact antenna design without sacrificing performance. By selecting appropriate dielectric materials with specific permittivity values, the antenna maintains resonant frequencies and impedance characteristics while achieving reduced physical dimensions compared to conventional air-backed patch antennas
Solution Approach 2:
The integration of dielectric material with the patch antenna creates a composite structure where the dielectric provides both size reduction and performance enhancement. The dielectric resonator coupled to the patch antenna enables compact form factor while maintaining or improving bandwidth and spectral characteristics
3Measurement precision
If conventional antennas are used in multipath environments, then device complexity is minimized, but location determination precision deteriorates
Solution Approach 1:
The patent employs feed termination techniques where specific feed points are terminated with resistors to eliminate unwanted resonant modes and improve signal quality. This relatively simple modification to the antenna feeding structure significantly enhances location determination precision by reducing multipath interference effects without requiring complex signal processing or multiple antenna arrays
Solution Approach 2:
The antenna system utilizes adjustable geometric parameters (patch dimensions, dielectric thickness, feed positions) to optimize performance for specific operating conditions. By tuning these parameters, the antenna achieves improved directional characteristics and reduced sensitivity to multipath effects, enhancing location determination precision in challenging environments
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 system achieves improved spectral performance and bandwidth, enabling accurate determination of distance, location, and direction of remote devices in multipath environments, enhancing the precision and reliability of RTLS.
Implementation Method 1
The dielectric may include a dielectric constant in a range between 3 and 40 and configured to limit the size of the antenna substantially limit impacting spectral performance of the antenna
Implementation Method 2
an antenna operable to at least one of transmit and receive wireless communications
Implementation Method 3
a termination element coupled to a feed of the antenna to provide a wider bandwidth configuration over non-terminated configurations
Data Source
AI summary
A system is provided for an antenna construction with a higher dielectric constant to support miniaturization without substantially impacting spectral performance of the antenna.