Dual Band Sector Antenna: Custom Mining Communication Solution
Dual Band Sector Antenna
1, Frequency range: 2400-2500MHz & 5150-5850MHz
2, Gain: 13-15dBi
3, Polarization: ±45°
4, Half power beam width: H 65°, V 40°
Client Challenge
A leading mining communication systems integrator required a rugged dual band sector antenna for coal mining operations with strict requirements:
Frequency Coverage: Simultaneous 2.4GHz (2400-2500MHz) + 5.8GHz (5150-5850MHz) operation
Radiation Pattern: Horizontal beamwidth >60° for wide coverage in tunnel networks
High Gain: >12dBi at 2.4GHz / >15dBi at 5.8GHz to penetrate dense rock structures
Harsh Environment: IP67-rated, corrosion-resistant, and explosion-proof certification
Engineering Innovation
Breaking Conventional Design Limitations
Traditional die-cast radiators couldn’t balance wide beamwidth and high gain.
Our R&D team pioneered a laser-cut aluminum sheet radiation structure with:
Precision Tuning: 0.1mm tolerance slots to control current distribution
Multi-Resonant Elements: Nested dipole arrays for independent band optimization
Lightweight Construction: 40% weight reduction vs. die-cast alternatives
Performance Trade-Off Resolution
| Parameter | Conventional Design | RF Element’s Solution |
|---|---|---|
| Horizontal Beamwidth | ≤45° | 62° |
| Gain (2.4GHz) | 10-11dBi | 12.5dBi |
| Gain (5.8GHz) | 13-14dBi | 15.8dBi |
| Weight | 3.2kg | 1.9kg |
Technical Specifications
| Model | RFE-DBSA-M2400/5800 |
|---|---|
| Frequency Bands | 2400-2500MHz + 5150-5850MHz |
| Gain | 12.5dBi @ 2.4GHz / 15.8dBi @ 5.8GHz |
| Beamwidth (H/V) | 62° x 14° @ 2.4GHz 58° x 8° @ 5.8GHz |
| Polarization | Dual-slant ±45° |
| VSWR | ≤1.5:1 |
| Power Handling | 100W continuous |
| Connector | 2 x N-Female |
| Operating Temp | -40°C to +85°C |
| Ingress Protection | IP67 |
| Material | Laser-cut 6061 aluminum + UV-stabilized radome |
Field Results in Mining Deployment
1. Coverage Enhancement
Tunnel Penetration: 30% signal strength improvement vs. previous antennas
Interference Immunity: -25dB cross-band isolation eliminated 2.4GHz/5.8GHz crosstalk
2. Reliability Metrics
Zero Failures: 12-month operation in coal dust/humidity extremes
Maintenance Cost: Reduced by 60% due to no corrosion/delamination
3. Deployment Scale
200+ units installed across 3 mining complexes
7km maximum point-to-multipoint link distance achieved
Why This Dual Band Sector Antenna Succeeded
1. Laser-Cutting Advantages
Pattern Flexibility: Optimized slot geometry for beamwidth/gain balance
Thermal Stability: Uniform heat dissipation prevented distortion at high power
2. Mining-Specific Validation
MSHA Certification: Met mining safety standards for explosive atmospheres
Client Testimonial
"RF Element’s dual band sector antenna solved our coverage-depth dilemma in underground mines. Their willingness to abandon conventional approaches and deliver a purpose-built solution enabled seamless VoIP and sensor monitoring across our toughest sites."
— Chief Engineer, Mining Communication Systems Ltd.
