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María García Fernández¹, Yuri Álvarez López¹, Fernando Las-Heras¹

¹Area of Signal Theory and Communications, University of Oviedo, 33203 Gijón, Spain.

Sensors (Basel, Switzerland)

|November 14, 2019

Summary

This study enhances on-site antenna measurements using unmanned aerial vehicles (UAVs). The improved system reduces measurement time and geo-referring uncertainties for accurate antenna performance assessment in real environments.

Keywords:

Unmanned Aerial Vehicles (UAVs)antenna diagnostics dual probes dual-band Real Time Kinematics (RTK)high directive antennas on-site antenna measurement phaseless techniques

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Area of Science:

Electromagnetics and Antenna Theory
Robotics and Autonomous Systems
Measurement Science and Metrology

Background:

On-site antenna measurements are crucial for assessing performance in real operational environments.
Unmanned aerial vehicles (UAVs) and advanced post-processing techniques have reduced the complexity and cost of these measurements.
Centimeter-level accuracy positioning and geo-referring, phase retrieval, and near-field to far-field transformations enable UAV-based near-field measurements.

Purpose of the Study:

To present an improved UAV-based on-site antenna measurement system.
To reduce geo-referring uncertainties and flight time through simultaneous acquisition on two calibrated measurement surfaces.
To enhance the positioning and geo-referring subsystem using a dual-band real-time kinematics (RTK) unit.

Main Methods:

Implementation of simultaneous acquisition on two calibrated measurement surfaces.
Enhancement of the positioning and geo-referring subsystem with a dual-band real-time kinematics (RTK) unit.
Validation through on-site measurement of an offset reflector antenna.

Main Results:

Reduced geo-referring uncertainties and flight time achieved.
Successful validation of the enhanced UAV system's capabilities.
Comparison of results with anechoic chamber spherical range measurements and previous system version.

Conclusions:

The improved UAV-based system offers enhanced accuracy and efficiency for on-site antenna measurements.
The dual-band RTK unit and dual-surface acquisition significantly contribute to system performance.
The validated system provides reliable antenna performance data in real-world conditions.