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RF transistor aimed at secondary surveillance radar aviation apps

Posted: 04 Sep 2012 ?? ?Print Version ?Bookmark and Share

Keywords:RF transistor? secondary surveillance radio? GaN on SiC? 1011GN-700ELM?

Microsemi has released what it says is the first in a family of RF transistors for high-power air traffic control (ATC), secondary surveillance radio (SSR) applications. The 700W peak 1011GN-700ELM operates at 1030MHz and supports short- and long-pulsed extended length message (ELM). The device is based on gallium nitride (GaN) on silicon carbide (SiC) technologies, which are geared for high-power electronics applications.

The devices include multiple high-pulsed power GaN on SiC transistors for both L, S and C-band radar systems. The company also offers a suite of GaN microwave power devices, which includes the following S-band radar models: 2729GN-150, 2729GN-270, 2731GN-110M, 2731GN-200M, 3135GN-100M, 3135GN-170M, 2735GN-35M and 2735GN-100M. Several new products are in development for L-band avionics products covering 960-1215MHz; L-band radar covering 1200-1400MHz; and S-band radar, higher power devices covering 2.7-2.9GHz.

The 1011GN-700ELM transistor claims to deliver unparalleled performance with 21dB of power gain and 70 percent drain efficiency at 1030Mhz to improve reduce overall drain current and heat dissipation. Systems benefits that are achieved with GaN on SiC high electron mobility transistor (HEMT) include single-ended design with simplified impedance matching, replacing lower power devices that require additional levels of combining, and single stage pair that provides 1.3kW with margin, four-way combined to provide full system 4 kW. Its 65VC operating voltage reduces power supply size and DC current demand. In addition, the device touts an extremely rugged performance that improves system yields and boasts amplifier size that is 50 percent smaller than devices built with Si BJT or LDMOS.

The 1011GN-700ELM is offered in a single-ended package and is built with 100 percent high-temperature gold (Au) metallization and wires in a hermetically solder-sealed package for long-term military reliability. Microsemi offers Demo units which are put on loan to the customer for a few weeks. Due to the cost of the product free samples are not provided. Demo units are available to qualified customers.

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