RFI RDA9-65 Ruggedised 9 Element Yagi Antenna 400–420MHz 13dBi (Black Powder Coat)

The RFI RDA9-65 Ruggedised 9 Element Yagi Antenna is a high-performance directional antenna designed for professional radio communications operating across the 400–420MHz UHF frequency band. Delivering 13dBi of gain, it is ideal for long-distance point-to-point links, repeater networks, telemetry, SCADA systems, and critical communications infrastructure.

Constructed from heavy-duty welded aluminium with a durable black powder-coated finish, the RDA9-65 is engineered to withstand harsh environmental conditions while providing exceptional RF performance. Its narrow beamwidth and excellent front-to-back ratio maximise signal strength in the desired direction while minimising unwanted interference, making it an ideal solution for demanding fixed-site installations.

Why Choose the RFI RDA9-65?

When dependable long-range communications are essential, the RDA9-65 delivers outstanding performance, durability, and reliability.

Key Features

• Operates across the 400–420MHz UHF frequency range
• High 13dBi directional gain
• Rugged 9-element Yagi design
• Heavy-duty welded aluminium construction
• Durable black powder-coated finish
• Narrow beamwidth for improved signal focus
• High front-to-back ratio reduces interference
• DC-grounded elements for enhanced lightning and static protection
• N Female connector with weather-resistant cable tail
• Designed for permanent outdoor installations
• Australian designed and manufactured

High-Gain Directional Performance

The RDA9-65 is designed to maximise communication distances by concentrating RF energy in a single direction.

This makes it ideal for:

• Point-to-point radio links
• Fixed repeater sites
• SCADA and telemetry networks
• Utility communications
• Mining operations
• Transport infrastructure
• Public safety radio systems
• Industrial communications
• Remote monitoring applications

Its directional design helps extend coverage while improving link stability and network efficiency.

Engineered for Harsh Environments

Built for permanent outdoor installations, the RDA9-65 is designed to perform reliably in demanding conditions.

The rugged construction offers:

• Outstanding resistance to high winds
• Excellent vibration tolerance
• Long-term corrosion protection
• Superior mechanical strength
• Reliable performance in coastal and industrial environments
• Reduced maintenance requirements

The black powder-coated finish provides additional protection against the elements while offering improved durability for exposed installations.

Reduced Interference for Clearer Communications

A high front-to-back ratio helps reject unwanted signals arriving from behind the antenna, improving overall system performance.

Benefits include:

• Reduced RF interference
• Cleaner received signals
• Improved network reliability
• Better receive sensitivity
• Enhanced long-distance communication performance

This makes the antenna particularly effective in congested RF environments where signal quality is critical.

Professional Fixed-Site Construction

Every component of the RDA9-65 has been designed for reliable long-term operation.

Construction features include:

• Heavy-duty welded aluminium boom
• Precision aluminium elements
• Durable black powder-coated finish
• Weather-resistant N Female connector
• Short cable tail for simplified installation
• DC-grounded design for improved static discharge and lightning protection
• Suitable for repeater sites, communications towers, and infrastructure projects

Its robust design makes it an excellent choice for critical communication networks where downtime is not an option.

Typical Applications

The RFI RDA9-65 is ideally suited to:

• Repeater stations
• Radio communications towers
• Utility networks
• Mining sites
• Transport and rail infrastructure
• Emergency services
• Industrial facilities
• Local government radio systems
• SCADA systems
• Telemetry networks
• Remote communications sites

Why Buy From Mobile Systems Limited?

Mobile Systems Limited provides complete radio communication solutions throughout New Zealand.

Our experienced team can assist with:

• Fixed-site radio network design
• Repeater infrastructure
• Directional antenna selection
• Professional installation
• RF testing and optimisation
• Coverage planning
• System commissioning
• Ongoing maintenance and technical support

Whether you're expanding an existing radio network or building a new communications site, we can recommend and install the right antenna solution for your application.

Frequently Asked Questions

What frequency range does the RDA9-65 cover?

The antenna is designed for professional radio systems operating between 400MHz and 420MHz.

What is the gain of the antenna?

The RDA9-65 provides 13dBi of directional gain, making it ideal for long-distance radio links and repeater installations.

Is this antenna suitable for outdoor installations?

Yes. It is specifically designed for permanent outdoor use, featuring welded aluminium construction and a durable black powder-coated finish for excellent weather resistance.

What applications is this antenna best suited for?

The RDA9-65 is ideal for repeater systems, point-to-point radio links, telemetry, SCADA, utility communications, mining operations, transport infrastructure, and emergency service networks.

Does the antenna help reduce interference?

Yes. Its narrow beamwidth and high front-to-back ratio help reject unwanted signals, improving communication reliability and signal quality.

Can Mobile Systems Limited supply and install this antenna?

Absolutely. Mobile Systems Limited supplies, installs, tests, aligns, and commissions fixed-site antenna systems, repeater networks, and professional radio infrastructure throughout New Zealand.