Mobile Terminal OTA Testing With Reproducible Positioner Paths

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Solution Overview

Problem

Measurement reproducibility in OTA environments is compromised due to varying antenna behavior on the DUT side resulting from different operation paths of the positioner to measurement positions.

Innovation Solution

A mobile terminal testing device with a positioner operation recording unit that stores and reproduces the operation path of the positioner to a preset number of angular sample points, and a positioner operation control unit that adjusts the DUT to the correct angle for consistent measurements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the positioner operates to different measurement positions using different operation paths, then the measurement coverage is improved, but the measurement reproducibility deteriorates due to varying antenna behavior

Engineering Contradiction:

Improvemeasurement coverageVSAvoidmeasurement reproducibility

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system performs preliminary actions by recording the operation path (sequence of angular positions) when first reaching a measurement position. This recorded path is then reproduced in subsequent measurements to ensure consistent antenna behavior and improve measurement reproducibility while maintaining the ability to access different measurement positions

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the positioner uses a fixed operation path to reach measurement positions, then the measurement reproducibility is improved, but the flexibility to adapt to different measurement scenarios is reduced

Engineering Contradiction:

Improvemeasurement reproducibilityVSAvoidmeasurement flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The system dynamically adapts by recording operation paths during initial measurements and reproducing them for consistent results. The system maintains flexibility by allowing path recording for different measurement scenarios while ensuring reproducibility through path reproduction, creating a dynamic balance between fixed procedures and adaptive capabilities

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If the antenna behavior changes due to different positioner operation paths, then the measurement adaptability is improved, but the measurement precision deteriorates

Engineering Contradiction:

Improvemeasurement adaptabilityVSAvoidmeasurement consistency

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The system uses feedback by recording the actual operation path taken during measurement and reproducing this recorded path in subsequent measurements. This feedback mechanism ensures that the same sequence of angular positions is followed, maintaining consistent antenna behavior and measurement precision while preserving adaptability to different measurement scenarios

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250261007A1Mobile terminal testing device and mobile terminal testing method

Publication Date: 2025.08.14 ANRITSU CORP

AI summary

There is provided a mobile terminal testing device that can improve measurement reproducibility at the same measurement position. The terminal testing device includes a positioner operation recording unit 16c that stores an operation path of the DUT scanning mechanism 56 to the measurement position by tracing back from the measurement position to a preset number of the angular sample points PS, and a positioner operation control unit 16d that controls the DUT scanning mechanism 56 according to the operation path stored in the positioner operation recording unit 16c to adjust the DUT 100 to an angle of the measurement position when performing measurement at the measurement position.