How to Choose the Right GNSS Antenna for Your Application

June 1, 2026 · GNSS Antenna Team

Choosing the right GNSS antenna can be the difference between a project that delivers centimeter accuracy and one that struggles to maintain a fix. This guide walks through the key factors to consider.

1. Identify Your Required Frequency Bands

Modern GNSS receivers support multiple bands. The more bands your antenna covers, the faster your RTK fix and the better your performance in obstructed environments.

L1 only: Sufficient for basic navigation and timing
L1 + L2: Standard for RTK surveying
L1 + L2 + L5: Recommended for professional and challenging environments
Full multi-band (including BeiDou B3, Galileo E6): For maximum redundancy

2. Match the Gain to Your Cable Length

The LNA gain in your antenna needs to compensate for cable loss. As a rule of thumb:

Short cables under 5 meters: 28 to 35 dB gain is enough
Medium cables 5 to 15 meters: 38 to 42 dB gain
Long cables over 15 meters: 45 dB or higher, possibly with inline amplifier

3. Consider the Operating Environment

Outdoor antennas need IP67 or higher waterproof rating, UV-resistant housing, and a wide operating temperature range. For aviation or marine use, look for ruggedized models with certified vibration resistance.

4. Phase Center Stability Matters for Survey Work

For surveying applications, the antenna’s phase center variation directly affects measurement accuracy. Geodetic-grade antennas publish their phase center offset (PCO) and variation (PCV) data, which should be loaded into your post-processing software.

5. Connector Type and Cable

TNC and SMA are the most common connectors. Ensure your cable matches the antenna and receiver, and use low-loss cable (RG-58 for short runs, LMR-240 or better for longer runs).

Summary-20260603

Match the antenna’s frequency support to your receiver’s capability, choose gain based on cable length, prioritize weatherproofing for outdoor use, and consider phase center specs if precision matters. When in doubt, contact our team for application-specific recommendations.