Ubiquiti airFiber 11 Complete Low-Band Kit (AF11-Complete-LB)

The Ubiquiti airFiber 11 Complete Low-Band Kit (AF11-Complete-LB) is a fully integrated, point-to-point wireless backhaul solution designed to operate in the licensed 11 GHz spectrum. This kit includes all essential components for deployment: the airFiber AF-11FX radio, a high-performance 35 dBi AF-11G35 antenna, and a pre-installed low-band duplexer (AF-11-DUP-L), providing a complete solution tailored for professional-grade, long-distance connectivity. Engineered to support carrier-grade performance, the system is capable of delivering over 1.2 Gbps of real throughput across distances exceeding 300 kilometers, making it ideal for ISPs, network operators, and enterprises requiring robust and scalable backhaul infrastructure.

At the heart of the kit is the airFiber AF-11FX radio, which is specifically optimized for licensed 11 GHz use. Unlike general-purpose radios, the AF-11FX uses a custom modem and radio design built for long-range performance and ultra-low latency. It supports both single- and dual-polarity (MIMO) configurations, offering flexible deployment depending on the application and regulatory constraints. The radio is housed in a rugged, weather-resistant enclosure and includes advanced RF features such as frequency agility, selectable channel bandwidths ranging from 3.5 MHz to 56 MHz, and AES-128 encryption to ensure secure data transmission.

The accompanying AF-11G35 antenna, with its 35 dBi gain and narrow 2.5° beamwidth, is built specifically for precision and long-range signal delivery. It supports both H/V and ±45° slant polarization, providing better resistance to RF interference and greater link reliability in crowded environments. The integrated mounting kit allows for precise alignment and stable installation in outdoor conditions. Constructed with durability in mind, the antenna withstands high winds, temperature extremes, and other environmental stressors commonly encountered in remote deployments.

Pre-installed in the radio, the low-band duplexer supports frequency operation between 10.7 and 11.7 GHz, depending on local licensing requirements. For full MIMO functionality, a second duplexer (purchased separately) can be installed. The device includes four SMA connectors and two N-type RF connectors, as well as dual Ethernet ports: one Gigabit and one 10/100 Mbps. It supports passive PoE and also accepts direct DC input, giving installers multiple power options.

Ubiquiti provides intuitive configuration and monitoring through its airOS user interface, while the system integrates seamlessly with UISP for centralized management. The interface allows users to adjust radio settings, monitor link performance, and deploy firmware updates remotely.

In summary, the Ubiquiti airFiber 11 Complete Low-Band Kit (AF11-Complete-LB) is a high-capacity, long-distance, licensed-band solution tailored for demanding network backhaul applications. Its modular components, advanced RF design, and carrier-class reliability make it an exceptional choice for scalable wireless infrastructure.