Active Radar vs. Passive Radar for Automatic Doors

The key difference between active radars and passive radars lies in one core feature: whether they actively emit detection signals. Tailored for automatic door scenarios, here is the streamlined comparison for marketing use.

I. Brief Introduction

Active Radar: Reliable for All Scenarios

▪  Working Mode. Emits electromagnetic waves (microwaves/infrared) and detects reflected signals to identify targets.

▪  Core Advantages. Long detection range, strong anti-interference (resists strong light, dust, fog), and works for both moving and stationary objects.

▪  Ideal Applications. High-traffic indoor & outdoor spaces (shopping malls, hotels, garage entrances) , delivers stable performance in complex environments.

2. Passive Radar: Cost-Effective for Indoor Use

▪  Working Mode. No signal emission, captures target's inherent signals (e.g., human body infrared radiation) to trigger door opening.

▪  Core Advantages. Low power consumption, budget-friendly, and excellent stealth performance.

▪  Ideal Applications. Simple indoor settings (offices, residential entryways) , best for light-traffic areas without direct strong light.

II. Quick Comparison at a Glance

▪ Signal Source.  Active radar, self-emitted. Passive radar, target/environment-generated.

▪ Anti-interference.  Active radar, strong (light/dust/fog-resistant) . Passive radar, moderate (sensitive to temperature/light) .

▪ Best For.  Active radar for indoor & outdoor high-traffic sites.  Passive radar for indoor low-traffic spaces. 

▪ Cost & Power . Active radar, slightly higher cost & power . Passive radar, low cost & energy-efficient.

Final Recommendation

▪ Choose active radar for high reliability and versatile environment adaptation.

▪ Choose passive radar for cost-saving indoor applications with simple requirements.