Gl-Ba400 Multi-Star Multi-Frequency High Precision GPS Gnss Measurement Antenna for Unmanned Aerial Vehicles (UAVs)

• Customization: Available
• Directionality: Rhcp
• Frequency Band: L1 Band
• Model NO.: GL-BA400
• Material: ABS
• Sturcture Form: Surface Antenna
• VSWR: <1.5
• Product Name: Multi-Band Gnss Spiral Antenna
• Keywords: GPS Glonass Antenna
• Frequency: GPS/Glonass/Compass/Galileo
• Gain: 38±2dBi
• Connector: SMA Male
• Mounting Method: Screw
• Frequency Range: 1197-1278/ 1559-1612MHz
• V.S.W.R: ≤2 .0
• Axial Ratio: Elevation 90 ° :≤3 / Elevation 15 ° :≤5
• Front to Back Power: ±60° ≥15db
• Phase Center: <2 mm
• Impedance: 50ω
• Polarization: Rhcp
• Lna Gain: 38±2db
• Noise Figure: <1.0
• Transport Package: Standard Packaging or Customized
• Specification: Standard Specifications or Customized
• Trademark: GLOBAL
• Origin: Henan, China
• HS Code: 8517710000
• Production Capacity: 5000PCS/Day

Product Description

Product Description

MULTI-STAR MULTI-FREQUENCY SPIRAL ANTENNA
PN:  GL301JC

GL301JC  is a multi-star and multi-frequency active spiral antenna, designed with multi-arm spiral technology, supporting compass B2 and B3. L1/L2 or L1/L5 tri-band satellite navigation signal reception for GPS, GLONASS, and GALILEO systems. It can meet the needs of multi-system compatibility and high-precision measurement, and can be widely used in portable equipment, UAVs, and other high-precision guidance position occasions, accepting user customization.

Technical Characteristics

Multi-arm helix technology is used to ensure right-handed circular polarization and phase center performance, reducing the impact of measurement errors.

An antenna unit using the air medium has the characteristics of high gain, small gain roll down, and low elevation satellite signal reception is good, to ensure that, in some of the more serious occasions can still be normal star.

3 protective covers for the antenna for long-term work in the field.

Specification

RTK Antenna Drawing
Frequency Range (MHz)	BDS:B1; GPS;L1; GNONASS:G1 Galileo E1 ;L-Band
Peak Gain	≥5.5 dBi
Polarization	RHCP
VSWR	≤2.0
Axial Ratio	≤3dB
Impedance	50Ω
LNA Gain	40±2dB
Horizontal Coverage Angle	360°
In-band Flatness	±2dB
Noise figure	≤2.0
Phase center	±2mm
Operating voltage	3.0~12V DC
working current	≤45mA
Connector	TNC-K
Humidity	95% Non-condensing
Storage temperature	-45℃ to +85℃
Operating temperature	-40℃ to +80℃
Weight	≤350g

Functional Advantages

ADVANCED MULTI-ARM HELIX DESIGN

Ensures excellent Right-Hand Circular Polarization (RHCP) and stable phase center performance (<2 mm), significantly reducing measurement errors and enhancing positioning reliability.

WIDE MULTI-SYSTEM COMPATIBILITY

Supports all major global navigation satellite systems (GPS, GLONASS, GALILEO, Compass) across multiple frequency bands L1/L2/L5, B2/B3, ensuring signal availability and redundancy worldwide.

SUPERIOR SIGNAL RECEPTION

The air dielectric antenna element offers high gain, minimal gain roll-off, and excellent low-elevation satellite signal reception, maintaining stable performance in challenging environments.

HIGH-PERFORMANCE INTEGRATED LNA

Features a low-noise amplifier with high gain (38±2 dB) and an ultra-low noise figure (<1.0 dB) to amplify weak signals and improve overall system sensitivity.

ROBUST & PROTECTED CONSTRUCTION

Built with three protective radome layers, ensuring long-term durability and reliable operation in harsh outdoor and field conditions.

Core Applications

1. High-precision RTK (Real-Time Kinematic) surveying and mapping
2. Unmanned Aerial Vehicle (UAV) and drone navigation systems
3. Precision agriculture and autonomous machine guidance
4. Portable and handheld professional GNSS equipment
5. Geodetic monitoring and scientific research

FAQ

Q1: Is this antenna compatible with all GNSS systems?
A: Yes, it supports GPS, GLONASS, Galileo, and COMPASS (B2/B3).

Q2: How does the air medium improve performance?
A: Reduces signal loss and enhances gain stability, especially for low-elevation satellites.

Q3: Can it withstand heavy rain or dust?
A: Yes, the IP67 rating ensures protection against water and dust ingress.

Q:4 What power supply is required?
A: Operates on 3.3~12V DC, compatible with most portable batteries and field equipment.

Q5: Is calibration needed for phase center accuracy?
A: Minimal calibration required due to <2mm phase center stability.

Q6: Is it suitable for Arctic environments?
A: Designed for harsh conditions, but confirm temperature specs with the manufacturer.

Q7: How to reduce signal interference?
A: RHCP polarization and front-to-back ratio ≥15dB minimize multipath effects.