Sirio CX 440 UHF 440-455MHz 3/4 Wave J-Pole Base Antenna

The Sirio CX 440 is a professional UHF base-station antenna covering 440-455MHz. It uses a 3/4-wave coaxial J-pole design with omnidirectional radiation and vertical polarisation, making it suitable for fixed UHF radio systems operating within its specified frequency range.

The CX 440 is factory set for 440-455MHz at SWR ≤1.5 and requires no tuning. Sirio specifies 0dBd / 2.15dBi gain, 250W CW maximum power, a 50-ohm impedance and an N-female connector. The antenna is DC-grounded for static protection and designed for mast installation.

Features

• 440-455MHz UHF frequency range
• 3/4-wave coaxial J-pole design
• No tuning required
• Omnidirectional radiation pattern
• Linear vertical polarisation
• 0dBd / 2.15dBi gain
• 250W maximum power (CW)
• 50-ohm impedance
• DC-grounded construction for static protection
• N-female antenna connector
• Designed for mast mounting

Technical Specifications

• Manufacturer: Sirio
• Model: CX 440
• Sirio Product Number: 2102701.00
• Supplier SKU: 11-645
• Antenna Type: 3/4-wave coaxial J-pole
• Frequency Range: 440-455MHz @ SWR ≤1.5
• Tuning: No tuning required
• Impedance: 50 ohms
• Radiation: Omnidirectional
• Polarisation: Linear vertical
• Gain: 0dBd / 2.15dBi
• Maximum Power: 250W CW
• Grounding Protection: DC-Ground
• Connector: N-female
• Height: Approx. 590mm
• Weight: Approx. 540g
• Mounting: On-mast
• Mast Diameter: 35-42mm
• Materials: Aluminium, brass, stainless steel and nylon

Package Contents

• 1 x Sirio CX 440 antenna

Important: This antenna is intended for radio systems operating within the 440-455MHz range. Users are responsible for ensuring that their transmitting equipment, frequency use and installation comply with applicable licensing and regulatory requirements.