GPS External Antenna

GPS External Antenna is a standalone radio frequency component specially designed to receive weak RF signals from Global Navigation Satellite Systems (GNSS), including GPS, Beidou, GLONASS, Galileo and other satellite systems. Unlike built-in antennas, it is separated from the main device via a coaxial cable. This design overcomes the physical shielding limitations of equipment enclosures, allowing the antenna to be installed in open outdoor areas or on vehicle roofs for an optimal Field of View (FOV) of satellites.

How does it work? 

 The RF signals transmitted by GPS satellites are extremely weak when they reach the ground (typically ranging from -125 dBm to -160 dBm). High-quality GPS External Antenna ensures efficient signal capture through the following mechanism:

1. Right-hand circular polarization (RHCP) matching

The antenna features a special microstrip patch design that perfectly matches the right-hand circular polarization characteristics of satellite signals, thereby eliminating signal attenuation caused by changes in the device's orientation.

2. LNA low-noise amplifier

Built-in high-performance LNA (low-noise amplifier) that amplifies weak signals while maintaining an extremely low noise figure (typically <2 dB) and compensates for insertion loss incurred during feeder transmission.

3. Anti-multipath interference design

By optimizing the ground plane and choke coil structure, low-elevation interference signals reflected from buildings or the ground are effectively suppressed.

Core Selling Points

As a company deeply rooted in the RF field,China Well-known antenna Manufacturer, Our product has demonstrated significant advantages in actual testing:

• Multi-system compatibility across the entire frequency band

Supports full-frequency bands L1/L2/L5/L6 and L-Band, seamlessly integrating with systems such as GPS, BeiDou, and Galileo to meet high-precision RTK positioning requirements.

• Outstanding anti-interference capability

Measured data show that, even in complex urban canyons or near high-voltage transmission towers, the out-of-band suppression capability remains excellent, effectively reducing the risk of system lock-loss.

• Industrial-grade protection standard

It features ultrasonic encapsulation and a dual waterproof design, achieving an IP67 protection rating and maintaining stable performance even in extreme environments ranging from -40℃ to +85℃.

• Flexible customized services

Supports customization of various interfaces such as SMA and TNC; cable length and magnetic/screw mounting methods can both be adjusted according to requirements.

Technical Specifications

Which Devices Are Compatible?

Our GPS External Antenna is widely used in the following fields:

1. Smart Connected Vehicles and ADAS

Installed on the vehicle roof, it penetrates the car's anti-explosion film to provide centimeter-level positioning for autonomous driving and fleet management systems.

2. Precision Agriculture and Drones

Mounted on the top of agricultural drones or farm machinery, it features strong electromagnetic interference resistance, ensuring precise automatic cruising and accurate pesticide spraying.

3. Geodetic Surveying and Base Station Time Synchronization

As a core component of base stations or RTK receivers, the stable phase center error (±2 mm) ensures millimeter-level measurement accuracy.

4. Marine and Ship Navigation

Salt-spray corrosion-resistant design ensures continuous, reliable heading and position data even in harsh marine environments.

5. IoT Asset Tracking

Designed with long cables, it can be easily concealed on the exterior of containers or large machinery, enabling logistics monitoring worldwide.

In-depth comparison with competing products

Installation and Usage Illustrated Guide

1. Location Selection：Please be sure to install the antenna on a level surface with an unobstructed view and free of metal interference (such as the roof of a car or the top of equipment).

2. Waterproofing treatment：The outdoor connection points must be sealed using a self-melting waterproof tape applied in a "321" wrapping method to prevent rainwater from flowing along the cable into the equipment.

3. Grounding and Lightning Protection：Before the feeder cable enters the equipment room or device, it is recommended to install a feeder lightning arrester and ensure that the arrester is properly grounded nearby.

4. Wiring Specifications：When routing cables, "drip loops (U-shaped bends)" should be installed to prevent rainwater from flowing backward.

How to Choose the Right GPS External Antenna?

Looking for a reliable one Supplier At that time, it is recommended to focus on evaluating the following three points:

1. Clarify frequency band requirements：For basic navigation, simply select the L1 single-frequency antenna. If high-precision RTK or anti-interference performance is required, be sure to choose an L1/L2/L5 multi-frequency antenna.

2. Assess the installation environment：For in-vehicle or outdoor use, the IP67 waterproof rating plus a magnetic base is the top choice; for fixed base stations, screw installation combined with a choke coil for multipath mitigation is recommended.

3. Verify cable loss：If the cable length exceeds 5 meters, the supplier must provide low-loss cables; otherwise, the LNA's gain will be offset by cable loss.

Why choose us?

Shenzhen Qianmu Communication Technology Co., Ltd. is not only a GPS external antenna manufacturer but also your trusted RF technology partner. We have our own independently developed microwave anechoic chambers and a team of experienced engineers, enabling us to provide one-stop customized services covering prototyping, testing, and mass production. Leveraging Shenzhen's well-established electronics industry ecosystem, we deliver competitive lead times and cost-effective solutions while maintaining excellent product quality.

FAQ

Q1: Is it compatible with the BeiDou system? 

A: Absolutely. Our antenna features a multi-feed design and natively supports mainstream global GNSS systems, including GPS, BeiDou, GLONASS, and Galileo.

Q2: As a manufacturer, what is your minimum order quantity (MOQ)? 

A: We support flexible procurement options. For standard models, we accept small-batch trial orders. For customized models, please contact our sales team to obtain the latest quotation and specific MOQ information.

Q3: How do you choose between an active external GPS antenna and a passive model? 

A: For automotive applications, industrial control systems, surveying and mapping projects, and outdoor applications, an active GPS External Antenna is required. Passive models are only suitable for very short indoor distances within 1 meter and may experience significant signal loss over longer cables. All Qianmu Factory flagship models adopt active designs.

Q4: Can the antenna use an extended cable? What is the maximum supported length? 

A: The maximum recommended length for standard RG174 cable is 10 meters. If the cable length exceeds 10 meters, please contact the supplier to replace it with a low-loss LMR RF cable. The factory can also customize extra-long antennas with cables up to 20 meters.