Probe Antenna Electromagnetic Environment Simulation
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Solution Overview
Problem
Current testing methods for wireless sensing and communications systems lack the capability to simulate complex electromagnetic environments with high time and angular resolution, limiting their effectiveness in evaluating wireless systems under various operational conditions.
Innovation Solution
A method utilizing a probe antenna to transmit signals from multiple positions relative to a wireless system under test, allowing for the simulation of electromagnetic environments with nanosecond time resolution and milliradian angular resolution over a wide solid angle, by recording and combining signals to replicate radar return pulses and Doppler effects within an anechoic chamber or similar testing facility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional testing methods are used for wireless systems, then the testing setup is simple, but the capability to simulate complex electromagnetic environments with high time and angular resolution is lacking
Solution Approach 1:
The electromagnetic environment simulation is segmented into multiple discrete angular positions and time samples. The probe antenna systematically moves through predefined angular positions around the wireless system under test, capturing signals at each position. This segmentation enables high angular resolution (milliradian level) and time resolution (nanosecond level) by treating the continuous electromagnetic environment as a collection of discrete measurable components.
Solution Approach 2:
The testing methodology transitions from traditional single-position or limited-position measurements to three-dimensional angular space sampling. By moving the probe antenna through multiple angular positions (azimuth and elevation angles) around the wireless system, the method captures electromagnetic signals from all directions, creating a comprehensive spatial representation of the electromagnetic environment that traditional linear testing cannot achieve.
2Reliability
If signals are transmitted from multiple positions to simulate electromagnetic environments, then the simulation accuracy is improved, but the testing time and complexity increase
Solution Approach 1:
The angular positions and measurement parameters are predetermined and programmed before the actual testing begins. The system pre-defines the complete set of angular positions, probe antenna orientations, and signal transmission sequences. This preliminary preparation enables the automated execution of complex multi-position measurements without requiring real-time decision-making, significantly reducing the overall testing time while maintaining comprehensive coverage.
Solution Approach 2:
The measurement process is designed to continuously capture electromagnetic signals across all angular positions without interruption. The probe antenna systematically moves through predefined angular positions, and at each position, signals are continuously recorded over a predetermined time period. This continuous measurement approach ensures that no valuable electromagnetic environment data is missed and enables efficient data collection for accurate simulation.
3Measurement precision
If high dynamic range resolution is used to record signals, then the measurement precision is improved, but the data processing complexity increases
Solution Approach 1:
The methodology replaces complex physical electromagnetic environment setups with a systematic mechanical scanning approach. Instead of creating actual complex electromagnetic scenarios with multiple transmitters and reflectors, the system uses a single probe antenna that mechanically moves through predefined angular positions to synthesize the electromagnetic environment. This substitution simplifies the physical setup while maintaining measurement accuracy through precise positional control and systematic data collection.
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
Enables accurate simulation of electromagnetic environments, providing detailed insights into wireless system performance under various conditions, including radar return pulses and Doppler effects, thereby enhancing testing capabilities.
Implementation Method 1
transmitting from the probe antenna a signal ψ, an electromagnetic signal sent from the probe antenna simulating incoming radiation from a remote source
Implementation Method 2
the signal received by the wireless system under test
Implementation Method 3
radar return pulse from multiple targets, with appropriate Radar Cross Section 'RCS' and Doppler effects
Data Source
AI summary
An electromagnetic environment simulation method. Embodiments of the invention provide for nanosecond or better time resolution and milliradian angular resolution simulation of the dynamic electromagnetic environment of a wireless system under test.