Comtech X-Band Low-Noise Block Down Converter Series

Application
Our X-Band Low-Noise Block Down Converter Series (LNB) meets or exceeds system requirements for commercial and military
geosynchronous satellites worldwide. Their compact design and rugged construction make them ideal for transportable applications and severe environments. They have a comprehensive set of options to accommodate systems ranging from Very Small Amplifier Terminal (VSATs) to major earth stations. The X-Band LNB allows for interfacing, at the antenna, with our LPOD family of X-Band outdoor BUCs for sourcing of the LNB bias voltage and high stability reference in either single or redundant configurations.

Technology
The amplifiers incorporate both HEMT devices for low-noise temperature performance and GaAs FET devices for low intermodulation. The units use surface mounted components for robotic manufacturing techniques, thereby ensuring maximum product consistency and enhanced reliability. The X-Band LNB includes integrated filtering to address adjacent power issues peculiar to demanding X-Band terminals.

Reliability
The amplifier series utilizes proprietary circuitry and high-quality components to achieve an MTBF in excess of 160,000 hours. Each unit is subjected to a 72-hour burn-in and temperature cycled from -40 to 140°F (-40 to +60°C).

Construction
The LNBs are housed in waterproof enclosures with small profiles to better accommodate redundancy configurations. The enclosures also provide a pressurizable, integral waveguide flange.

Accessories
Transmit reject filters, cables and other integration materials are offered as required.

Subsystems
1+1 (one backup for one primary) and 1+2 (one backup for two primary) redundant LNB systems are available, complete with mounting plate, brackets and indoor redundancy controller/power supply. Transmit reject filters, cables and other integration materials are offered
as required.