Exploration of Anechoic Chamber Characterization with Autonomous Unmanned Aerial Systems

Adhyapak, Anoop; Diddi, Mithun; Kling, Matthew J.; Colby, Adam; Singh, Hanumant

doi:10.23919/eucap51087.2021.9411389

Cited by 5 publications

(10 citation statements)

References 6 publications

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“…That minimizes the moment of inertia and ensures good maneuverability. However, mounting the probe antenna close to the gravity center has the consequence that the drone frame and propellers affect the probe radiation pattern [55]- [57] and, thus, also the field measurement results as observed in [10]. To overcome this drawback of commercially available UAVs, a custom drone frame as shown in Fig.…”

Section: B Uav-based Probe Antenna Positioning Platform 1) Mechanical...mentioning

confidence: 99%

“…Small hovering platforms are also suitable for field distribution measurements due to their minimal scattering behavior compared to conventional probe positioning systems. This is beneficial, for example, for the quiet zone characterization of anechoic chambers [10]. Conventional mechanical multi-axis nearfield scan systems typically perform measurements on simple canonical surfaces like a plane, cylinder, or sphere.…”

Section: Introductionmentioning

confidence: 99%

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A Cost-Effective Tethered-UAV-Based Coherent Near-Field Antenna Measurement System

Mauermayer¹,

Kornprobst

2022

IEEE Open J. Antennas Propag.

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For antenna measurements, the device under test (DUT) is usually transported to an anechoic chamber equipped with a scanner system. To measure on-site, unmanned aerial vehicles (UAVs) are a flexible solution as they can precisely maneuver a probe antenna over a surface in the DUT's nearfield region. In this work, the designed multi-rotor UAV enables electromagnetically optimal placement of the probe antenna and effective gravity center re-balacing by payload position adjustment. The onboard software-defined radio (SDR) serves as a dual-channel receiver for the dual-polarized probe and as a signal source. For phase-coherent measurements, the source signal is transmitted to the DUT via an optical fiber tethering the UAV to the ground control station. Power supply cables allow unlimited flight times. A laser-based tracking system originating from virtual reality (VR) applications measures the probe position and orientation. The developed operator software guides the UAV along a trajectory and records the irregularly distributed near-field samples. An inverse equivalent sources solver (IESS) with full probe correction computes equivalent sources for antenna diagnostics and the DUT far field. The deployed components make the system very cost-effective. Still, verification measurements demonstrate its usability and the accuracy of the results for frequencies up to several GHz.INDEX TERMS near-field antenna measurement, unmanned aerial vehicle (UAV), software-defined radio (SDR), radio-frequency over fiber (RFoF), near-field to far-field transformation (NFFFT), inverse equivalent sources solver (IESS)

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Section: B Uav-based Probe Antenna Positioning Platform 1) Mechanical...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Cost-Effective Tethered-UAV-Based Coherent Near-Field Antenna Measurement System

Mauermayer¹,

Kornprobst

2022

IEEE Open J. Antennas Propag.

View full text Add to dashboard Cite

show abstract

“…That minimizes the moment of inertia and ensures good maneuverability. However, mounting the probe antenna close to the gravity center has the consequence that the drone frame and propellers affect the probe radiation pattern [54]- [56] and, thus, also the field measurement results as observed in [10]. To overcome this drawback of commercially available UAVs, a custom drone frame as shown in Fig.…”

Section: B Uav-based Probe Antenna Positioning Platformmentioning

confidence: 99%

“…Small hovering platforms are also suitable for field distribution measurements due to their minimal scattering behavior compared to conventional probe positioning systems. This is beneficial, for example, for the quiet zone characterization of anechoic chambers [10]. Conventional mechanical multi-axis near-field scan systems typically perform measurements on simple canonical surfaces like a plane, cylinder, or sphere.…”

Section: Introductionmentioning

confidence: 99%

A Cost-Effective Tethered-UAV-Based Coherent Near-Field Antenna Measurement System

Mauermayer¹,

Kornprobst²

2022

Preprint

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<p>For antenna measurements, the device under test (DUT) is usually transported to an anechoic chamber equipped with a scanner system. To measure on-site, unmanned aerial vehicles (UAVs) are a flexible solution as they can precisely maneuver a probe antenna over a surface in the DUT’s near-field region. In this work, the designed multi-rotor UAV enables electromagnetically optimal placement of the probe antenna and effective gravity center re-balacing by payload position adjustment. The on-board software-defined radio (SDR) serves as a dual-channel receiver for the dual-polarized probe and as a signal source. For phase-coherent measurements, the source signal is transmitted to the DUT via an optical fiber tethering the UAV to the ground control station. Power supply cables allow unlimited flight times. A laser-based tracking system originating from virtual reality (VR) applications measures the probe position and orientation. The developed operator software guides the UAV along a trajectory and records the irregularly distributed near-field samples. An inverse equivalent sources solver (IESS) with full probe correction computes equivalent sources for antenna diagnostics and the DUT far field. The deployed components make the system very cost-effective. Still, verification measurements demonstrate its usability and the accuracy of the results for frequencies up to several GHz.</p>

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“…And help translate autonomous research into real-world applications outside the robotics community. In this work, we developed an autonomy stack [26,27] for the COTS-based Matrice M100 UAV with a closed source FC. We developed our framework to leverage the aforesaid benefits of COTS platforms.…”

Section: Autonomy Stack For Uavsmentioning

confidence: 99%

Multiple UAVs for synchronous-shared tasks and longterm autonomy

Diddi¹

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Exploration of Anechoic Chamber Characterization with Autonomous Unmanned Aerial Systems

Cited by 5 publications

References 6 publications

A Cost-Effective Tethered-UAV-Based Coherent Near-Field Antenna Measurement System

A Cost-Effective Tethered-UAV-Based Coherent Near-Field Antenna Measurement System

A Cost-Effective Tethered-UAV-Based Coherent Near-Field Antenna Measurement System

Multiple UAVs for synchronous-shared tasks and longterm autonomy

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