GPS Antenna Selection Guide: Core Differences Between Active and Passive Antennas

I. Core Differences

Active Antenna (power supply required)

Features: Built-in signal amplifier to enhance weak signal reception

Advantages:
• High stability in complex environments (high-rise buildings/metal film inside the car)
• Supports extension cables over 1 meter (roof/ship installation)

Applicable scenarios: vehicle navigation, industrial equipment, drones

Passive Antenna (power supply free)

Features: Pure physical structure, no external power supply required

Advantages:
• Small size and zero power consumption
• Cost reduction of more than 30%

Applicable scenarios: smart watches, outdoor handheld devices, low-cost projects

II. Key points for selection decisions

Preference is given to active antennas:
In-car metal film environment | Urban high-rise building dense area | Ship/large vehicle

Preference is given to passive antennas:
Outdoor open area | Portable wearable device | Cost-sensitive products

III. Common pitfall avoidance guide

In-vehicle installation:

Metal film windows will shield signals, so active antennas must be used and connected to the roof

Avoid placing the antenna under the dashboard (metal parts interfere)

Portable devices:

Passive antennas need to maintain a view of the sky (may lose connection if placed in pockets)

Avoid being close to electromagnetic interference sources such as mobile phones/WiFi

Industrial scenarios:

Long-distance transmission (>1 meter) must be paired with active antennas

In high-temperature environments, choose industrial-grade modules that are resistant to -40℃~85℃

IV. Summary in one sentence

“For complex environments that require gain – choose active; for lightweight and portable environments that require simplicity – choose passive”