Antenna Array Defect Detection via Far-Field Back-Propagation
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Solution Overview
Problem
Traditional methods for debugging radio-frequency antennas are cumbersome and prone to providing misleading results due to improper use of scanners or probes, which can alter the antenna's radiation characteristics, making it difficult to accurately identify defects in antenna arrays and devices.
Innovation Solution
A method involving a transmitting antenna array that sends a radio-frequency debugging signal to a receiving antenna in the far-field region, processed to derive a reconstructed near-field representation, allowing for the identification of defects in the antenna array or device-under-test by comparing against a reference template using back-propagation algorithms and phase coding schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a technician uses a scanner or probe to carry out signal measurements in the near-field radiation region of the antenna, then signal measurements can be obtained, but the measurements tend to be misleading or erroneous and the process is cumbersome
Solution Approach 1:
The patent introduces a far-field receiving antenna as an intermediary to capture the radio-frequency debugging signal transmitted by the antenna array. This mediator allows indirect measurement of the near-field radiation characteristics without physically intruding into the near-field region, thereby avoiding measurement errors and operational complexity while still obtaining accurate signal radiation distribution information through back-propagation algorithms.
2Measurement precision
If a probe is introduced into the near-field region of an antenna, then signal measurements can be taken, but the radiation characteristic of the antenna is changed and signal measurements do not accurately reflect true signal values
Solution Approach 1:
The patent extracts the measurement process from the near-field region by transmitting a debugging signal from the antenna array and capturing it in the far-field region using a receiving antenna. This extraction eliminates the harmful interaction between the probe and the antenna's near-field radiation, preventing any distortion of the antenna's radiation characteristics while still enabling accurate signal measurement through far-field to near-field back-propagation.
3Productivity
If an inexperienced technician uses the scanner or probe in an improper manner, then measurements can be obtained, but misleading or erroneous results are provided
Solution Approach 1:
The patent implements a self-service measurement system where the antenna array itself transmits a debugging signal that carries information about its own signal radiation distribution. The system automatically processes the received signal through back-propagation algorithms to reconstruct the near-field representation, eliminating the need for technician intervention in positioning and operating complex scanning equipment, thereby ensuring reliable results while maintaining high productivity.
4Ease of repair
If traditional near-field measurement methods are used, then debugging can be performed, but the process is cumbersome and time-consuming
Solution Approach 1:
The patent employs periodic action by transmitting a coded debugging signal sequence from the antenna array that systematically varies over time. The far-field receiving antenna captures these periodic signals, and back-propagation algorithms process the time-varying signal to reconstruct the near-field radiation distribution. This periodic transmission approach enables complete debugging information to be obtained efficiently without requiring slow, manual near-field scanning operations.
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 enables accurate and efficient defect detection in antenna arrays and devices, reducing the risk of misleading results and improving troubleshooting efficiency by providing clear, interpretable reconstructed near-field representations.
Implementation Method 1
the transmitting antenna array configured to propagate via the radio-frequency debugging signal, information indicative of a signal radiation distribution of the transmitting antenna array
Implementation Method 2
applying a back-propagation algorithm to the digital dataset to derive a reconstructed near-field representation of the transmitting antenna array
Data Source
AI summary
Various illustrative embodiments disclosed herein generally pertain to detecting defects by using a radio-frequency debugging signal transmitted by a transmitting antenna array towards a receiving antenna located in a far-field region of the transmitting antenna array. The radio-frequency debugging signal, which is configured to provide information pertaining to a signal radiation distribution of the transmitting antenna array, is received in the receiving antenna and conveyed to a test unit. The test unit digitizes the received radio-frequency debugging signal to obtain a digital dataset and applies a back-propagation algorithm to the digital dataset for deriving a reconstructed near-field representation of the transmitting array. The reconstructed near-field representation is compared to a signal radiation reference template in order to detect a defective amplitude and/or a defective phase that is indicative of a defect in the transmitting antenna array and/or a device-under-test coupled to the transmitting antenna array.