20260226 Field Verification Case of Terrestrial DTV Broadcasting Station Antenna Patterns Using Drone @

ATSC Implementation Team 5: Tower Network (IT-5) 72nd Meeting

February 26 2026 UTC @ 9:30 AM to 10:30 AM EST

Transcript

1. TTAR-07.0048 Technical Report (2025) Field Verification Case of Terrestrial DTV Broadcasting Station Antenna Patterns Using Drone Sungho Jeon (MBC) Secretary, TTA WG80210 In collaboration with RRA and ETRI February 27, 2026 (Fri.)
6. Enhanced GPS
9. Why Field Verification? TTAR-07.0048 (2025) 13
16. Measurement dataset based on vertical radiation pattern measurements
17. [RRA Communications Conformity Assessment Center] (Icheon)
21. Field Measurement Preparation Steps (1) Pre-flight UAV inspection (2) Configure the autonomous flight route (3) Conduct a test flight and calibrate/correct the position
31. Q & A Backup Slides
32. [Q1] Broadcast RTK? eGPS? GNSS Base Stations Service Platform Network Devices MBC’s Hybrid BB-BC RTK System ㆍImplementing a network RTK system over a one-way broadcast network ㆍMBC will deliver solutions in the short term and sell mid-term receivers in the long term aim for loyalty share of total sales Broadcast RTK Platform ATSC3.0 Correction Raw Data LTE/5G MBC RTK Correction Data EDGEBEAM WIRELESS
33. [Q2] Antenna Configuration for Drone Measurement (For RF measurement) DTV Broadcast Receiving Antenna, 1 Unit Directional dipole antenna covering 400 MHz to 868 MHz DTV band. (For Dual -RTK) GNSS Antennas, 2 Units Dual-GNSS compass -free navigation system that configures and calculates the heading vector using two antennas mounted at the front and rear of the drone. (For data communication) Drone -mounted Communication Antenna, 1 Unit Integrated data and video transmission antenna for 2.4 GHz and 5.8 GHz, enabling ground control and video transmission from the air unit to the ground. (For control communication) GCS and Controller Antennas, 2 Units External controller antennas for maintaining control and communication up to 20- 30km distance.
34. [Q3] What the Drone Measures: Near -Field and Far -Field Distance Near -field Far-field Reactive Radiating (Fresnel) (Fraunhofer) Antenna Antenna D (m) 1 2 4 8 Reactive NF boundary, RRNF (m) 0.83– 0.94 2.35– 2.67 6.65– 7.55 18.8– 21.4 Fraunhofer distance, RFF (m) 3.60– 4.64 14.4– 18.5 57.5– 74.2 230– 297 * Drone method: repeatable 2D slice field verification (azimuth / elevation), supported by cross-checks and an uncertainty budget. For full far-field characterization of large apertures: use coherent NF sampling & NF -to-FF transformation (amplitude and phase required). Assumed band: f = 539–695 MHz, λ = 0.43 –0.56 m ✓ The drone flight radius may be near-field for large apertures. It is best interpreted as radiating near -field (Fresnel) field verification , unless the Fraunhofer condition is satisfied. Reactive –Radiating boundary Fraunhofer boundary At R = 28.6 m: far -field holds for D ≲ 2.5 –2.8 m (UHF); larger apertures are in the Fresnel region.