BUNKER ANTENNA 403-470 MHZ

Frequency Range

• Operates across 403 – 470 MHz UHF band — wide enough to cover many standard radio communication channels without tuning.

📈 Bandwidth

• The continuous 67 MHz bandwidth supports multiple channels within the 403–470 MHz range, making it suitable for multi-channel systems.

📡 Polarization

• Vertical polarization: most radio systems in this band use vertical antennas for efficient propagation and compatibility.

🔄 VSWR (Voltage Standing Wave Ratio)

• A low VSWR — typically less than 1.5:1 — means minimal reflected power and efficient use of transmitted energy, which improves performance and reduces interference.

🪶 Gain

• Gain values vary by design:

  • Some bunker antennas have 0 dBi gain — ideal for stable omni coverage without focusing energy.

  • Other models (e.g., collinear designs) can provide higher gain (~12 dBi) to extend range and strengthen signal performance.

🔌 Connector Types

• Often use N-Type or UHF connectors for durable outdoor connections to coax feed lines.

🛠 Physical & Environmental Features

• Built solidly to withstand outdoor conditions — wind, rain, and temperature changes.

• Some variants feature lightning protection / grounding to protect attached equipment from electrical surges.