Antenna Positioning Structure With Simulated Link Antenna
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Solution Overview
Problem
Existing test arrangements for beamforming devices face challenges in measuring emissions from multiple positions around the device under test, particularly when the link antenna collides with or is occluded by the measurement antenna system, leading to gaps in data collection and incomplete compliance measurements.
Innovation Solution
A test arrangement with a measurement antenna system that simulates the link antenna for positions occupied by the measurement antenna system, allowing continuous measurement of emissions by taking over communication and steering the main lobe, enabling comprehensive testing without gaps, even when the link antenna is positioned behind or before the measurement antenna system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the link antenna rotates on a full circle around the device under test, then comprehensive measurement coverage is achieved, but the link antenna collides with or is occluded by the measurement antenna system
Solution Approach 1:
The measurement antenna system creates a virtual copy of the link antenna by simulating its signal characteristics and position. When the physical link antenna is occluded by the measurement antenna system, the measurement antenna system generates synthetic signals that replicate what the link antenna would receive, allowing continuous measurement without physical collision or occlusion interruptions.
2Measurement precision
If the measurement antenna system occupies certain positions around the device under test, then measurement capability is provided, but the link antenna cannot access those positions
Solution Approach 1:
The measurement antenna system acts as an intermediary between the link antenna and the device under test. It temporarily assumes the role of the link antenna in positions where the physical link antenna cannot physically access, mediating the communication and measurement functions to maintain system versatility while preserving measurement capability in occluded positions.
3Loss of information
If the link antenna is occluded by the measurement antenna system, then communication with the device under test is interrupted, but measurement data collection is incomplete
Solution Approach 1:
The measurement antenna system maintains continuous measurement action by switching between receiving actual signals from the link antenna and generating simulated link antenna signals. This continuity ensures that measurement data collection never stops, eliminating gaps that would occur during physical occlusion events and reducing total measurement time by avoiding repeated measurements after occlusion events.
Data Source
AI summary
A test arrangement for testing a device under test, the test arrangement comprises a measurement antenna system comprising a number of measurement antenna elements for measuring signals emitted by the device under test or emitting test signals to the device under test, a link antenna for communication with the device under test, and a mechanical antenna positioning structure that carries the link antenna and controllably moves the link antenna around the device under test, wherein for positions of the link antenna around device under test that are occupied by the measurement antenna system, the measurement antenna system simulates the link antenna.