UM981 ULTRALIGHT RTK GNSS SMART ANTENNA

UM981S/UM981-02 ultraLight GNSS Smart Antenna for precision and RTK positioning

UM981S/UM981-02 ultraLight RTK GNSS Smart Antenna is a next-generation, ultra-lightweight RTK GNSS solution built around the powerful Unicore UM981S/UM981-02 module, integrated with a high-precision RM3100 compass and a compact helical antenna. It is purpose-designed for weight-sensitive UAVs, robotics, and mobile applications where every gram matters.

Lightweight, powerful, and dependable — the UM981S/UM981-02 ultraLight RTK GNSS Smart Antenna is the ideal choice for next-generation UAVs, autonomous systems, and precision applications that demand top-tier performance without compromise.

Overview

With its advanced multi-band RF front-end, the UM981S/UM981-02 ultraLight Smart Antenna is capable of simultaneously tracking all four major GNSS constellations — ensuring robust positioning and centimeter-level accuracy when combined with correction data.

Engineered for flexibility, it supports concurrent reception of GPS, GLONASS, Galileo, BeiDou, QZSS, and SBAS, delivering a high-performance navigation solution even in challenging environments. Thanks to its exceptional sensitivity, fast acquisition times, and built-in interference suppression, the UM981S/UM981-02 ultraLight provides reliable, high-precision positioning where traditional receivers struggle.

Device Features:

• Based on NebulasIV GNSS SoC with integrated RF, base band, and high precision algorithm
• Supports robust high-precision positioning via RTK, PPP, and Galileo HAS correction services.
• All-system multi-frequency RTK engine and advanced RTK technology
• Independent tracking of different frequencies and 60dB narrow band anti-jamming technology
• Low Noise Amplifier (LNA) integrated in antenna
• High Gain: 28 dB typ. from antenna
• Axial ratio: 3 dB max.
• Tight Phase Center Variation (PCV)
• Power supply: 5 VDC
• Two optional UART
• Integrated 3-axis digital compass sensor RM3100 for accurate heading and orientation

Physical Characteristics:

• Dimension: Ø50x41 mm
• Weight: 34 gr.
• IP Rating: IP55
• Operating Temperature: -10 °C ~ +60 °C
• Connector type: JST SH 6 pin, JST GH 6 pin
• Mounting Options: Waterproof 3M double-sided tape, Screw mount
• RoHS & Reach Compliant
• Fully assembled, tested, sealed, and ready for use

Kit included:

• Smart antenna – 1 piece
• Cable JST GH 1.25 6 pin to 6 pin 200mm – 1 piece
• Cable JST SH 1.0 6 pin to 6 pin 100 mm – 1 piece
• Waterproof 3M double-sided tape – 1 piece
• Screws 2.5x6 – 3 pieces