Blake UK 433MHz Helical Omnidirectional Antenna

The Blake UK BLA‑433‑OMNI is a high-performance helical omnidirectional antenna engineered for professional and hobbyist use in the 400–438 MHz frequency band. Its robust design and versatile mounting options make it an excellent choice for a wide range of low-power wireless applications, ensuring reliable signal transmission and reception.

Featuring a wide 360° horizontal beamwidth and a 35 to 85° vertical beamwidth, this antenna provides comprehensive coverage. Its polarisation—vertical or horizontal—is determined by the mounting method, allowing for flexible installation on walls or ceilings to suit your specific environment and requirements. The antenna is constructed with a durable acrylonitrile butadiene styrene (ABS) cover, offering protection and longevity.

Key Features & Specifications

• Frequency Range: 400–438 MHz, optimised for 433MHz operations.
• Antenna Type: Helical, omnidirectional.
• Gain: 5dB for enhanced signal strength.
• VSWR: 1.8, indicating efficient power transfer.
• Input Power: Handles up to 5W.
• Input Impedance: 50ohm for standard compatibility.
• Isolation: Greater than 24dB for reduced interference.
• Polarisation: Switchable between horizontal and vertical based on mount orientation.
• Mounting: Designed for wall installation.
• Dimensions: 33mm (H) x 22mm (W) x 2mm (D).
• Weight: 400 grams.

This antenna is engineered for stability and performance, making it a dependable component in any communication setup where consistent, clear signal integrity is paramount.