OTA Test Emulator Antenna Beam Control
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Solution Overview
Problem
Traditional over-the-air (OTA) testing of radio frequency signals in anechoic chambers is limited by fixed path directions and inability to include antenna effects, making it difficult to model complex radio channel scenarios effectively.
Innovation Solution
A method and system using a plurality of antenna elements in an anechoic chamber to form beams of a simulated radio channel, allowing for more flexible control of path directions and inclusion of antenna effects, with the emulator configured to simulate radio channels by dividing power and adjusting delays between antenna elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional OTA testing uses fixed antenna positions in an anechoic chamber, then the test setup is simple, but the path directions are limited and cannot model complex radio channel scenarios
Solution Approach 1:
The antenna system is segmented into multiple antenna elements that can be independently controlled. Each antenna element can be activated or deactivated based on the required path direction, allowing flexible modeling of different radio channel scenarios without requiring physical reconfiguration of the entire antenna array.
Solution Approach 2:
The antenna system transitions from a static configuration to a dynamic one where individual antenna elements can be selectively activated. The emulator dynamically controls which antenna elements are active based on the simulated channel conditions, enabling adaptable path direction control while maintaining a physically simple fixed antenna structure.
2Reliability
If traditional OTA testing uses single antenna elements, then the device complexity is low, but antenna effects cannot be included in the test
Solution Approach 1:
Different antenna elements are assigned different local qualities or characteristics that represent different antenna effects. By selectively activating specific antenna elements with particular characteristics, the system can include relevant antenna effects in the test while keeping inactive elements dormant, thus balancing test accuracy with system complexity.
Solution Approach 2:
The plurality of antenna elements serves multiple functions: some elements model different antenna radiation patterns, others represent different polarization characteristics, and still others simulate various gain levels. This multi-functionality allows a single antenna array to replace multiple specialized antennas, improving test reliability without proportionally increasing overall system complexity.
Data Source
AI summary
A testing system comprises an emulator having a simulated radio channel for communicating therethrough with the electronic device. The testing system comprises a plurality of antenna elements coupled to an emulator which forms a beam of a signal of a path of a simulated radio channel with at least two antenna elements of the plurality of antenna elements in an anechoic chamber.