UAV Data Link Board PCBA

High-Bandwidth Encrypted Command & Control Link — FHSS, LDPC, AES-256-GCM — DO-160 / IPC-6012 Class 3

Product Overview

The UAV Data Link Board from Superb Automation is a high-bandwidth, encrypted communication PCBA that serves as the primary digital pipeline between a UAV and its ground infrastructure. This board is engineered to simultaneously carry command-and-control (C2) uplink traffic, telemetry downlink data, and high-resolution payload imagery or video over a single coherent radio link, eliminating the weight and spectrum inefficiency of multiple separate radios. Implementing a frequency-hopping spread spectrum (FHSS) scheme across up to 128 channels with hop rates exceeding 100 hops per second, the board provides robust anti-jamming and anti-interception capabilities essential for secure UAV operations. All hardware is fabricated to IPC-6012 Class 3 and tested to DO-160 environmental standards.

The 6-layer PCB incorporates impedance-controlled differential pairs for high-speed LVDS signaling between the baseband processor and the RF transceiver, with careful length-matching to within ±5 mils on all critical nets. The board's digital core features an FPGA-based channel encoder implementing LDPC forward error correction with coding gains exceeding 8 dB, allowing reliable communication at signal-to-noise ratios where conventional systems would fail. A dedicated hardware encryption engine performs AES-256-GCM authenticated encryption on all data link traffic with zero software overhead. Dual antenna ports with active diversity combining using maximal-ratio combining (MRC) mitigate multipath fading in complex urban or mountainous terrain.

Key Specifications

DO-160 Environmental Qualification

The 6-layer PCB design addresses DO-160G requirements for conducted and radiated RF emissions (Section 21) and susceptibility (Section 20). The impedance-controlled differential pairs and continuous ground planes minimize unintended radiation. The FHSS architecture inherently provides resistance to narrowband interference, and an adaptive notch filter in the FPGA further suppresses co-channel interferers detected in real time. The dual-antenna MRC diversity combining provides a diversity gain of 3–6 dB, significantly improving link margin in multipath environments typical of urban UAV operations.

Test Strategy

Each assembled board undergoes end-to-end link testing across simulated channel conditions including AWGN, Rayleigh fading, and Rician fading profiles. Throughput, latency, and packet error rate are measured at all data rate configurations. The FHSS engine is tested for hop sequence randomness using NIST statistical test suite criteria. AES-256-GCM encryption is verified through known-answer tests. Diversity switching and MRC combining performance are measured using a two-channel vector signal generator with independent fading profiles.

More information