The 1575MHz 4dBi Magnetic GPS Antenna is a high-quality, high-reliability antenna assembly specifically engineered for the Global Positioning System (GPS) L1 carrier frequency (1575.42 MHz). Designed to capture and amplify the weak satellite signals, this antenna is the ideal solution for devices requiring dependable location, navigation, and precise timing data.
Featuring a sturdy magnetic base for flexible mounting, a balanced 4 dBi gain (often referring to the antenna element's gain plus the integrated Low Noise Amplifier—LNA), and a flexible RG174 coaxial cable, this antenna offers a professional, plug-and-play solution for automotive, fleet, and portable tracking systems.
Key Features and Technical Profile
This antenna system is built to ensure a robust signal link, compensating for the natural weakness of satellite signals.
1. Dedicated GPS L1 Performance
Frequency Focus: Precisely tuned to 1575.42 MHz, maximizing efficiency for the primary GPS L1 signal.
Active System Gain: The listed 4 dBi gain typically refers to the combined gain of the antenna element and its integrated Low Noise Amplifier (LNA). This active design is critical for boosting the extremely weak satellite signals, compensating for cable loss, and dramatically improving the receiver's overall sensitivity and Time To First Fix (TTFF).
Circular Polarization: Employs Right Hand Circular Polarization (RHCP). This is a vital feature that matches the GPS satellite signals, ensuring maximum energy transfer while effectively rejecting ground-reflected signals (multipath), which improves positional accuracy.
2. Magnetic Mounting and Cable Management
Secure Magnetic Base: The base of the antenna incorporates a powerful, heavy-duty magnetic mount. This allows for quick, tool-free installation and removal on any ferrous (steel) surface, such as a vehicle roof or a metal enclosure, ensuring the antenna is positioned externally for a clear view of the sky.
RG174 Coaxial Cable: The antenna uses RG174 low-loss coaxial cable. This cable is known for its high flexibility and small diameter, which is essential for easy and discreet routing through vehicle interiors, dashboards, and equipment racks. The RG174 offers good performance over the short-to-medium lengths typically used in these applications.
Weatherproof Design: The ceramic patch element is sealed within a compact, durable, weatherproof housing to protect it from moisture, dust, and UV exposure.
3. Connector Interface
The assembly is usually terminated with an industry-standard SMA Male connector or sometimes an MCX/MMCX connector, depending on the requirements of the host receiver device.2 The threaded SMA Male connector is preferred for mobile applications due to its secure, vibration-resistant connection.3
Impedance: The entire system maintains a standard 50Ω impedance, ensuring optimal power transfer from the LNA to the GPS receiver module.
Versatile Application Scenarios (Use Cases)
The high gain and flexible installation of this magnetic antenna make it ideal for a multitude of mobile and security applications:
1. Vehicle and Fleet Tracking
Telematics Systems: Providing continuous, reliable location data for fleet management, logistics, and heavy equipment tracking. The magnetic mount simplifies installation across diverse vehicle types.
In-Car Navigation: Enhancing the signal quality for aftermarket or portable navigation systems that require a strong, external GPS feed.
2. Mobile and Temporary Deployments
Asset Monitoring: Temporarily attached to trailers, containers, or high-value portable assets for real-time tracking and geo-fencing.
Testing and Surveying: Used by field engineers for signal strength testing and temporary data logging, allowing for fast setup and precise external placement.
3. Timing and Synchronization
