Quadruple-Band Indoor Base Station Antenna for 2G/3G/4G/5G Systems

Service Description

Production and Mechanical Design Files / Simulation Files / Prototype Models / 3D CAD Files / Test Results

This antenna is a compact, low-profile solution designed to support 2G, 3G, 4G, and sub-6 GHz 5G systems within a single unit. It efficiently covers four key frequency bands: 0.8 – 0.96 GHz, 1.7 – 2.7 GHz, 3.3 – 3.8 GHz, and 4.8 – 5.0 GHz. The design utilizes an asymmetrical dipole and parasitic patches for the lower bands. A folded, stepped-impedance feeding structure improves impedance matching and also functions as a radiator for the 3.5 GHz band. A separate T-shaped patch is integrated to generate the resonance for the 5 GHz band.

The design was optimized using a parallel surrogate model-assisted evolutionary algorithm (PSADEA) to achieve robust performance across all bands.

Constructed from aluminum radiating elements supported by a 3D-printed PVC framework and housed in a PVC box, the antenna achieves a sturdy yet low-cost and lightweight design.

Specifications

• Frequency Bands (Simulated):
  • 0.77 – 0.96 GHz
  • 1.32 – 2.8 GHz
  • 3.3 – 4.1 GHz
  • 4.79 – 5.0 GHz
• Impedance Bandwidth (VSWR ≤ 2):
  • 22% (0.77 – 0.96 GHz)
  • 71.8% (1.32 – 2.8 GHz)
  • 21.6% (3.3 – 4.1 GHz)
  • 4.3% (4.79 – 5.0 GHz)
•  Average Gain (Fabricated/Measured):
  • 5.4 dBi @ 0.8 – 0.96 GHz
  • 8.1 dBi @ 1.7 – 2.7 GHz
  • 8.5 dBi @ 3.3 – 3.8 GHz
  • 8.1 dBi @ 4.8 – 5.0 GHz
• Efficiency (Measured): > 80%
• Feeding: 50 Ω coaxial cable
• Dimensions: 204 × 175 × 39 mm³
• Materials: Compact low-cost structure with lightweight housing and reflector for durability
• Polarization: Dual-polarized
• Nominal Impedance: 50 ohm
• Reflector: Aluminum (1 mm thickness)

Applications

• Indoor environments
• Underground facilities
• Tunnels