G9811 Anti-Metal RFID Tag Deep Dive

Specifications

| Parameter | Value | |-----------|-------| | Model | G9811 | | Frequency | 860-960MHz | | Protocol | ISO18000-6C (EPC GEN2) | | Chip | Alien H3 | | Memory | 32bits TID / 96bits EPC / 512bits User | | Reading Distance | 0-8 meters (depends on reader) | | Writing Distance | 0-2 meters | | Data Retention | 10 years | | Size | 135×22×14.5mm | | Material | ABS | | Operating Temp | -20℃ ~ +100℃ |

Why GoKarts Need Anti-Metal Tags?

Metal's Effect on RFID

Regular RFID tags on metal surfaces will:

1. Signal Reflection: EM waves reflected by metal
2. Frequency Detuning: Antenna resonance shifts
3. Read Failure: Cannot be identified by reader

How G9811 Solves This

• ABS Shell Isolation: Creates dielectric layer between chip and metal
• Optimized Antenna Design: Tuned for metal surface applications
• Stability: Works even when directly mounted on kart's metal body

Installation Recommendations

Position

• Recommended: Front of kart for direct antenna line-of-sight
• Avoid: Engine bay (high temp), near wheels (vibration)

Mounting Methods

1. Adhesive backing (initial installation)
2. Screw mounting (long-term use)
3. Cable ties (easy replacement)

Memory Structure

TID (32 bits)  - Unique chip ID, read-only
EPC (96 bits)  - User-writable, stores kart ID
User (512 bits) - Extended storage

Real-World Testing

• With CF-815 + CF-RA1201, 8m reading distance

• 99.9% detection rate at 60km/h

• 10+ months trouble-free operation

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