Hybrid RF Direction Finding With Phase-Amplitude Antenna Modules
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Solution Overview
Problem
Existing direction finding systems face a tradeoff between accuracy, coverage, and flexibility, with phase-based techniques being highly accurate but inflexible, and amplitude-based techniques being flexible but less accurate.
Innovation Solution
A hybrid direction finding system using both phase-based and amplitude-based techniques, employing at least two antenna modules with multiple elements located at different locations, allowing simultaneous or sequential execution to achieve improved accuracy and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If phase-based direction finding technique is used, then measurement precision is improved, but adaptability deteriorates
Solution Approach 1:
The patent combines phase-based direction finding and amplitude-based direction finding into a hybrid system. The phase-based technique provides high accuracy for direction determination, while the amplitude-based technique provides flexibility in antenna placement and installation. By merging these two techniques, the system achieves both high measurement precision and high adaptability simultaneously.
2Adaptability or versatility
If amplitude-based direction finding technique is used, then adaptability is improved, but measurement precision deteriorates
Solution Approach 1:
The hybrid direction finding system merges amplitude-based and phase-based techniques. The amplitude-based component enables flexible antenna placement and installation configurations, while the phase-based component ensures high direction finding accuracy. The combination allows the system to achieve both adaptability and measurement precision that neither technique can achieve alone.
3Measurement precision
If single technique direction finding system is used, then device complexity is reduced, but measurement precision and adaptability cannot be simultaneously improved
Solution Approach 1:
The system employs antenna modules that serve multiple functions: they perform both phase-based direction finding and amplitude-based direction finding. This multi-functionality allows the same hardware infrastructure to support both techniques, reducing overall system complexity while achieving high precision and adaptability. The antenna modules are designed to be versatile, handling different direction finding methodologies without requiring separate dedicated hardware for each technique.
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 provides higher flexibility and accuracy compared to single technique systems, with phase-based accuracy enhanced by amplitude-based compensation and amplitude-based flexibility enhanced by phase-based location independence.
Implementation Method 1
The phase-based direction finding, also called phase technique, compares the phases of radio frequency signals received by the respective antennas, namely the antenna elements of one antenna module. Based on that comparison, the direction of arrival, DOA, of the radio frequency signal can be evaluated accordingly.
Implementation Method 2
The amplitude-based direction finding, also called amplitude technique, compares the amplitudes of radio frequency signals received by the respective antennas, namely the antenna modules. Based on that comparison, the direction of arrival, DOA, of the radio frequency signal can be evaluated accordingly.
Data Source
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AI summary
The invention relates to a system (10) for hybrid direction finding of a radio frequency signal. The system (10) comprises at least two antenna modules (12) that each comprise at least two antenna elements (16) which are configured to perform a phase-based direction finding. The at least two antenna modules (12) are located at two different locations (A-D). The at least two antenna modules (12) are configured to perform an amplitude-based direction finding. The system (10) is configured to perform a phase-based direction finding and an amplitude-based direction finding.