Smart Antenna HX-MR401A

HX-MR401A is a housed multi-band, multi-constellation smart antenna developed by Harxon. Combining Harxon’s world-leading antenna technology with Unicore’s full-constellation full-frequency RTK positioning module (UM980), HX-MR401A delivers precise positioning performance in a compact and integration-ready structure. It provides single-point meter-level accuracy, DGPS sub-meter level accuracy, and RTK centimeter/millimeter level accuracy, making it well-suited for various robotic lawn mower and UAV applications that require precise location and heading.

INTEGRATED DESIGN AND COMPACT FORM FACTOR
The compact smart antenna, weighing ≤40g and measuring Ø48\*H38mm, greatly reduces the weight of UAVs and features low power consumption. Additionally, the GNSS antenna and module are highly compatible, simplifying the development process and reducing costs for engineers, thereby improving the overall reliability of UAVs.

KEY FEATURES

• Smart helix antenna integrated with RTK module
• Small size and light weight (only ≤40g)
• Support for BDS, GPS, GLONASS, Galileo, QZSS, and SBAS
• Strong anti-interference performance
• Industrial-grade IP67 enclosure
• Stable phase center guarantees millimeter-level positioning accuracy

PRECISION-TUNED OEM GNSS ANTENNA
The HX-MR401A features an ultra-low profile Harxon helix antenna designed for high-precision positioning in UAVs. It offers superior satellite signal tracking for GPS, GLONASS, Galileo, BeiDou, QZSS, and SBAS, with excellent axial ratios, superior multipath mitigation, and a very precise phase center.

HIGH-PERFORMANCE RTK POSITIONING MODULE
HX-MR401A integrates Unicore’s full-constellation full-frequency RTK positioning module, which combines RF, baseband, and high-precision algorithms. The module can simultaneously track multiple frequencies from all GNSS systems, enabling high-precision RTK positioning.

STRONG ANTI-INTERFERENCE PERFORMANCE
The antenna includes a robust pre-filtered LNA with excellent out-of-band interference rejection. The RTK module offers 60 dB narrowband anti-jamming and advanced jamming detection technology, ensuring reliable performance even when UAVs are operated near power towers or electrical lines.

Parameter	Details
Signal Received	GPS (L1C/A, L2C, L2P(Y), L5)
	BDS (B1I, B2I, B3I, B1C, B2a)
	GLONASS (G1, G2)
	GALILEO (E1, E5a, E5b)
	QZSS (L1C/A, L2C, L5)
	SBAS (L1C/A)
Nominal Impedance	50Ω
Polarization	RHCP
Axial Ratio	≤3dB
Azimuth Coverage	360°
Output VSWR	≤2.0
Peak Gain	2.8dBi
LNA Gain	23±2dB
Noise Figure	≤2dB
Passband Ripple	±2dB
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)	20ns
Velocity Accuracy (RMS)	0.03m/s
Channels	1408
Time to First Fix	Cold Start <30s, Warm Start <29s, Hot Start <5s
Initialization Time	<5s (Typical)
Initialization Reliability	≥99.9%
Data Refresh Rate	50Hz Positioning
Differential Data	RTCM 3.X, CMR
Data Format	NMEA-0183, Unicore
Operation Voltage	5V
Power Consumption	500mW (Typical)
Operating Temperature	-40°C to +70°C
Storage Temperature	-40°C to +70°C
Humidity	95% Non-Condensing
Dimensions	Ø48 x H38mm
Weight	≤40g
Connector	GH1.25-6P
Mounting	3 x M2.5 Screws
Interface Pin Order
Pin 1	GND
Pin 2	TX1
Pin 3	RX1
Pin 4	RX2
Pin 5	TX2
Pin 6	VCC

Download Data Sheet