Smart Antenna HX-ME402A Integrated with RTK Module UM980

Introduction
Key Features
Parameters
Applications
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Introduction

HX-ME402A is a multi-band multi-constellation embedded smart antenna developed by Harxon. Combining Harxon’s world leading antenna technology with Unicore’s full-constellation full-frequency RTK positioning module UM980, HX-ME402A delivers precise positioning performance in a compact and integration-ready structure. It's able to provide single point meter level accuracy, DGPS sub-meter level accuracy and RTK centimeter/millimeter level accuracy, very suited for robotic lawn mower and unmanned aerial vehicle (UAV) applications that require precise location and precise heading.

Smart Antenna Integrated with RTK Module UM980
Support BDS/GPS/GLONASS/Galileo/QZSS/SBAS/L-band
Single Point Accuracy: Horizontal: 1.5m, Vertical: 2.5m
DGPS Accuracy: Horizontal: 0.4m, Vertical: 0.8m
RTK Accuracy: Horizontal: 0.8cm+1ppm, Vertical: 1.5cm+1ppm

Key Features

Integrated Design and Compact Form Factor

The compact smart antenna weighs ≤80g and measures Φ90* H24.4mm, featuring stable structure, good consistency, and reliable electrical performance. Additionally, the antenna and module are well compatible with each other, simplifying the development process.
Precision-Tuned OEM GNSS Antenna

The main part of HX-ME402A is Harxon’s small size and high performance OEM GNSS antenna designed for high precision positioning. The antenna provides a very stable phase center variation with advanced multipoint feeding technology, exceptional low elevation satellite tracking with symmetric radiation patterns.
High Performance RTK Positioning Module

HX-ME402A is integrated with Unicore’s full-constellation full-frequency RTK positioning module UM980, which integrates RF, baseband and high precision algorithm. It can simultaneously track multiple frequencies of all GNSS systems, enabling the module to output high-precision RTK positioning.
Strong Anti-Interference Performance

HX-ME402A is capable of offering superior positioning performance in challenging environments. The antenna equips a robust pre-filtered LNA that features an excellent out-of-band interference rejection performance, and the module features 60 dB narrowband anti-jamming.

Parameters

Signal Received	GPS L1C/A, L2C, L2P(Y), L5 GLONASS G1, G2, G3 BDS B1I, B2I, B3I, B1C, B2a, B2b GALILEO E1, E5a, E5b, E6 SBAS L1C/A QZSS L1C/A, L2C, L5 NavIC L5 L-Band
Nominal Impedance	50Ω
Polarization	RHCP
Axial Ratio (@Zenith)	≤3dB
Azimuth Coverage	360°
Peak Gain	4dBi

RTK Connection
Positioning Module	UM980
Single Point Accuracy	Horizontal: 1.5m Vertical: 2.5m
DGPS Accuracy	Horizontal: 0.4m Vertical: 0.8m
RTK Accuracy	Horizontal: 0.8cm+1ppm Vertical: 1.5cm+1ppm
Timing Accuracy (RMS)	20 ns
Velocity Accuracy (RMS)	0.03 m/s
Channels	1408, based on NebulasIV
Time to First Fix	Cold Start＜12s
Initialization Time	＜5s (Typical)
Initialization Reliability	＞99.9%
Data	Data Refresh Rate: 50Hz Positioning Differential Data: RTCM V3.X Data Format: NMEA-0183, Unicore