2 March 2016

Advantech Wireless launches second-generation 4.4–5.0GHz GaN-based amplifiers for extended troposcatter networks

Advantech Wireless Inc of Montreal, Canada (which manufactures satellite, RF equipment and microwave systems) has launched the second-generation 500W, 4.4–5.0GHz gallium nitride (GaN)-based solid-state power amplifier (SSPA). The product will extend wireless coverage to locations that were previously inaccessible, says the firm, and accomplish this with reduced size, weight and power requirements.

The new Super Compact TT Series SapphireBlu SSPA/SSPB provides high power density and operates over the low C-band TROPO frequency of 4.4–5.0GHz. The new SSPAs are designed as a direct replacement of older-generation Klystrons or traveling-wave tubes (TWTs).

Troposcatter (tropospheric scatter) is a method of communicating with microwave signals reflecting from the atmosphere for robust communications links over very long distances. "Tropospheric communication links are becoming a viable solution where there is now no satellite coverage or where satellite bandwidth cost is prohibitive," says VP of business development Cristi Damian. "These systems allow real-time communication in these remote locations and are difficult to locate or jam," he adds.  

Specific applications for the new system include:

• Extraction sites (such as oil or mining sites) which are often remote from existing networks, or where satellite bandwidth cost is prohibitive. The systems offer low operating cost not previously available, it is claimed.
• Military operations for strategic communications links, often in places where there is little or no infrastructure, and there is a need for mobile, secure, high bandwidth. The lighter GaN amplifiers allow the design of a redundant system while remaining under the two-man lift limit. This extends communications ranges with a jam-resistant and low-operating-cost solution.

The new SSPAs are reckoned to provide a 70% reduction in weight and size, and a 40% reduction in energy consumption compared to the previous generations of tropo SSPAs. They are suitable for tactical mobile applications where size, weight and power efficiency are critical — a match for the new generation of high-data-rate, long-haul, cost-efficient communication links using tropospheric scatter technologies. With high linearity, the systems are redundant, with built-in L-band up-converters, and are very energy efficient, says the firm.

Tags: GaN HEMT

Visit: www.advantechwireless.com