Range Limited Antenna Phase Difference Signal Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In RF environments, it is challenging to isolate and analyze signal sources within a limited physical region due to the wide distribution of signals, making it difficult to determine which signals are relevant for a specific area of interest.
Innovation Solution
A range-limited antenna system comprising multiple sets of elements and a RF signal-processing network that selectively provides gain for signals within a user-defined radius while attenuating signals outside this range, using a function that calculates phase angle differences across paired antenna sets to determine signal source proximity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional omnidirectional antennas are used to capture all RF signals, then signal coverage is maximized, but the ability to isolate signals from specific regions is lost
Solution Approach 1:
The antenna system divides the signal reception space into multiple directional sectors using antenna elements arranged in specific geometric patterns. Each element or group of elements is responsible for capturing signals from particular angular ranges, allowing the system to segment the omnidirectional space into manageable directional components that can be independently processed and combined to achieve range-limited sensitivity.
Solution Approach 2:
The patent transitions from traditional two-dimensional antenna patterns to three-dimensional spatial filtering by utilizing vertical element arrangements and elevation angle information. The antenna elements are positioned in three-dimensional space with specific coordinates, enabling the system to filter signals based on their spatial origin in all three dimensions, thereby achieving precise regional isolation while maintaining comprehensive coverage.
2Measurement precision
If antenna elements are added to improve directional selectivity, then signal isolation capability improves, but device complexity increases
Solution Approach 1:
The antenna system employs asymmetric element positioning and weighting schemes where certain elements are strategically placed at non-uniform intervals or with different orientations. This asymmetric configuration creates distinctive spatial signatures that enhance the system's ability to differentiate between signals from different ranges and directions, improving measurement precision without requiring a complete symmetric array that would increase complexity.
Solution Approach 2:
The patent implements dynamic signal processing where the antenna element configurations can be electronically reconfigured or weighted differently based on the desired observation direction or range. This dynamic adaptability allows the same physical antenna structure to serve multiple functions, reducing the need for additional fixed elements and thereby managing device complexity while maintaining high directional selectivity.
Data Source
AI summary
Range limited antenna includes at least two sets of antenna elements and an RF signal processing network connected to each set of antenna elements. The network has a function, F(Ξ,x)=ΦA(x)−ΦB(x)+ΦC(x)−ΦD(x) . . . +ΦN−1(x)−ΦN(x), where x is a signal, ΦA(x) is the phase angle of signal x at the first element set, ΦB(x) is the phase angle of signal x at the second element set, ΦN(x) is the phase angle of signal x at the set N, and Ξ contains all additional parameters which bear on the system. The network is configured to pass a signal for which F(Ξ,x)>ε, where ε is a threshold amount, such that the antenna has gain to signals within a radius and has attenuation outside the radius.