Active and Passive GPS Antenna Differences | Eteily Technologies

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Introduction

GPS (Global Positioning System) technology is now essential for fleet management, navigation, telecommunications, and Internet of Things devices. The antenna is one of the most crucial components that guarantees accurate GPS signal reception.
Active and passive are the two primary categories of GPS antennas. Despite having the same basic function of receiving satellite signals, they differ greatly in terms of application, performance, and design.

What is a GPS antenna?

Signals from satellites in orbit are picked up by a GPS antenna and sent to a GPS receiver. The accuracy of location data is significantly impacted by the antenna's efficiency because these signals are quite faint when they reach Earth.

What is an Active GPS Antenna?

A Low-Noise Amplifier (LNA) is built inside the antenna enclosure of an Active GPS antenna.
The weak satellite signals are strengthened by this amplifier before being transmitted to the GPS receiver via the wire.

🔧 Active GPS antenna features:

  • Integrated LNA amplifier to improve signal strength
  • needs DC power from the receiver, often between 3 and 5 volts.
  • Perfect for lengthy cable lines where signal loss might happen
  • provides more reliable and powerful signal reception

Tipical specifications of Active GPS Antennas:

Parameter Typical Specification
Frequency Range 1.575 GHz (L1 Band)
Gain 25–35 dB (with LNA)
VSWR ≤ 2.0:1
Voltage 3–5V DC
Noise Figure ≤ 2 dB
Connector Type SMA / MCX / U.FL
Application Vehicles, Base Stations, IoT Gateways

Applications for Active GPS Antennas:

  • Vehicle Tracking Systems
  • GPS Navigation Devices
  • Fleet Management Solutions
  • IoT Gateways and Routers
  • Outdoor GPS modules

What is a passive GPS antenna?

A Passive GPS Antenna does not include an amplifier. It immediately accepts satellite signals and transmits them to the receiver without amplification. These antennas are ideal for short cable connections that result in little signal loss.

🔧 Features of Passive GPS Antennas:

  • No internal LNA (no amplification).
  • Does not need external power
  • Suitable for short cable runs (up to 1-2 metres).
  • lightweight, small, and cost-effective.

Specifications of Passive GPS Antennas:

Parameter Specification
Frequency Range 1.575 GHz (L1 Band)
Gain 0–3 dBi
Voltage Supply Not required
VSWR ≤ 2.5:1
Connector Type SMA, U.FL
Impedance 50 Ω

Applications for Passive GPS Antennas:

  • Handheld GPS trackers
  • Drones & UAVs
  • Wearable GPS devices.
  • Compact IoT gadgets
  • Portable Navigation Equipment

Difference Between Active and Passive GPS Antennas

Parameter Active GPS Antenna Passive GPS Antenna
Amplifier (LNA) Includes built-in Low Noise Amplifier (LNA) No built-in amplifier
Power Requirement Requires external DC power (3–5 V) No external power required
Signal Strength High (boosted by amplifier) Moderate
Cable Length Support Suitable for long cables (up to 10m+) Limited to short cables (1–2m)
Applications Vehicles, Base Stations, IoT Gateways Portable and wearable GPS devices
Cost Slightly higher Lower
Noise Resistance Excellent Moderate

Which one should you choose?

Choosing between Active and Passive GPS antennas is based on your project requirements:

✔ Select an active GPS antenna if:

You must run a lengthy wire between the antenna and receiver.

Your gadget operates in poor signal locations.

You need great precision and reliable reception.

✔ Use Passive GPS Antenna if:

Your antenna and receiver are close together.

You require a low-power or battery-operated gadget.

You want a tiny and cost-effective GPS system.

Conclusion

Both Active and Passive GPS Antennas have distinct advantages and uses.
An Active GPS Antenna is ideal for high-performance, long-distance applications, whilst a Passive GPS Antenna is appropriate for portable, low-power devices.

Eteily Technologies India Pvt. Ltd. designs and manufactures a variety of GPS antennas, both active and passive, to ensure optimum signal reception, durability, and compatibility with contemporary GPS systems.

Contact Us

Eteily Technologies India Pvt. Ltd.
📫 Address: B28 Vidhya Nagar, Near SBI Bank,
 📍  District: Bhopal, PIN: 462026, Madhya Pradesh
🌐 Website: https://eteily.com

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