Compact Anechoic Chamber for Antenna OTA Testing
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Solution Overview
Problem
Current antenna testing systems are inadequate for efficiently testing the complex far-field properties of active antenna systems (AAS) due to the lack of suitable compact far-field testing systems, leading to incomplete characterization and potential antenna failures during installation, especially in high-speed radio-product manufacturing lines.
Innovation Solution
A compact anechoic chamber system with interchangeable antenna probe arrays and a multi-channel signal generation and analysis system, capable of synchronized RF signal transmission and reception, allowing for comprehensive over-the-air testing of both AAS and passive antennas within a smaller footprint, including near-field and far-field test capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional antenna testing systems are used, then antenna characterization can be performed, but the system size becomes too large for integration into high-speed manufacturing lines
Solution Approach 1:
The chamber is divided into functional modules including interchangeable probe arrays, absorbing material sections, and modular signal generation/analysis systems. This segmentation allows compact arrangement while maintaining full testing capabilities, enabling integration into manufacturing lines with limited space.
Solution Approach 2:
The system employs nested arrangements where probe arrays are positioned within the chamber volume, signal generation and analysis equipment are integrated into the chamber structure, and interchangeable panels are stored within the chamber housing. This nesting maximizes space utilization and reduces overall footprint.
2Measurement precision
If comprehensive far-field testing capabilities are provided, then complete antenna characterization is achieved, but the system complexity increases significantly
Solution Approach 1:
The interchangeable probe arrays serve multiple functions - they can be configured for different antenna types (AAS and passive), support both near-field and far-field testing modes, and accommodate various frequency ranges. This multi-functionality reduces the need for multiple specialized systems, thereby reducing overall complexity while maintaining comprehensive characterization capabilities.
Solution Approach 2:
The system employs dynamic reconfiguration through interchangeable probe arrays that can be swapped based on testing requirements. This dynamic adaptability allows a single system to handle diverse antenna testing scenarios without requiring permanent complex infrastructure for each test type.
3Measurement precision
If synchronized multi-channel signal generation and analysis is implemented, then accurate beamforming pattern measurement is enabled, but the device complexity and cost increase
Solution Approach 1:
The signal generation system and signal analysis system are synchronized through a common timing and control architecture. This merging of timing references and coordinated operation enables accurate beamforming measurements while reducing the need for separate independent systems, thereby controlling complexity and cost.
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 efficient and accurate testing of AAS and passive antennas' radiation properties and beamforming patterns in a compact setup, reducing the likelihood of antenna failures and enabling integration into high-speed manufacturing lines, while providing detailed characterization of antenna performance.
Implementation Method 1
a plurality of absorbing material at least substantially lining an interior of the chamber and capable of directing the irradiating test signals
Data Source
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AI summary
The disclosed exemplary apparatuses, systems and methods provide at least two realizations of synchronized antenna probe arrays. These antenna probe arrays may be used to generate and receive RF signals in a compact anechoic chamber for over the air antenna testing, or other applications such as far-field antenna test chambers. A compact anechoic chamber for over-the-air antenna testing may include at least: a chamber housing; an interchangeable irradiating test panel, integral to the chamber; a plurality of absorbing material at least partially lining an interior of the chamber and capable of directing the irradiating; at least one moveable cart suitable for moving and removing the antenna from the chamber; at least one panel interface for interconnecting the antenna and equipment for the testing, wherein a response of the antenna to the irradiating is communicated through the panel interface to the testing equipment; and at least one switch matrix for multiplexed switching of ones of signals of the testing.