Poynting · Antennen · LoRa/RFID · Tunnel · A-HELI-0006-V1-01 · grau · 690 - 960MHZ · Gewinn 13,5dBi

Key Benefits at a Glance

• Circular polarisation: left-hand for stable signal propagation in tunnel environments
• Unidirectional radiation: focused in one primary direction
• High gain: up to 13.5 dBi across the entire 690 to 960 MHz frequency range
• Robust construction: IP 65 protection, salt spray testing to MIL-STD 810G/ASTM B117
• Flexible mounting: ceiling mounting with eye hooks or mast mounting with U-bolt
• Application range: approved for indoor and outdoor use

Performance & Radiation Pattern

The antenna operates in the 690 to 960 MHz frequency range, achieving a maximum gain of 13.5 dBi. Its left-hand circular polarisation (LHC) enhances signal stability in high-reflection environments such as tunnels, where multipath propagation can impair linearly polarised antennas. A VSWR of less than 2:1 across 90% of the band ensures efficient power transfer with a permissible input power of 30 W and a nominal impedance of 50 ohms.

Application & Use Cases

The HELI-6 is engineered for M2M and IoT communications in mining and tunnel construction. Its unidirectional radiation pattern directs the signal in one primary direction, enabling targeted coverage of tunnel sections. The antenna is suitable for underground telemetry, establishing tunnel-wide data networks, and providing connectivity in hard-to-reach areas. It is specified for both indoor and outdoor use.

Durability & Environmental Protection

The grey PVC housing is rated IP 65 for protection against dust and water ingress. The antenna has passed salt spray testing to MIL-STD 810G/ASTM B117 and meets flammability class UL 94-HB and impact resistance IK 08. It is designed for operating temperatures from -40 °C to +70 °C and relative humidity up to 98%. Wind resistance is rated up to 120 km/h.

Mounting & Connection

The antenna features an N-type female bulkhead connector. Mounting options include ceiling installation with eye hooks (12 mm inner diameter) or mast mounting with a 65 mm U-bolt. The antenna has one port and operates as a SISO system. There is no DC short circuit. Available accessories include mounting brackets BRKT-45 and BRKT-47.

Certifications & Warranty

The antenna complies with CE and RoHS Directive 2011/65/EU and is manufactured under an ISO 9001:2015-certified quality management system. Poynting provides a 24-month warranty.