GaN HEMT Transistors handle 5 GHz WiMAX applications.

Press Release Summary:

Capable of operating in 5.8 GHz ISM band as well as 5.3 and 5.47 GHz U-NII bands, Models CGH55015F and CGH55030F gallium nitride (GaN) HEMT transistors are available in 15 and 30 W versions, respectively. They offer linearity of better than 2.5% EVM at average power under any WiMAX signal at 25% drain efficiency covering instantaneous bandwidth of 5.5-5.8 GHz. Both transistors are available with reference design amplifier platforms.

Original Press Release:

Cree Introduces Industry's First GaN HEMT Products for Use in 5 GHz WiMAX Applications

Durham, NC - June 4, 2008 - Cree, Inc (NASDAQ: CREE) announces the sample release of two breakthrough gallium nitride (GaN) HEMT transistors for use in WiMAX applications covering the 4.9 to 5.8GHz frequency band. The new transistors, CGH55015F and CGH55030F, are the first released GaN HEMT WiMAX products specified to operate at up to 5.8 GHz, a performance level that further demonstrates Cree's leadership in GaN technology.

Significant potential benefits offered by the new 15 watt and 30 watt devices include:

o A four-fold increase in efficiency compared with similar power level GaAs MESFET devices
o Elevated frequency operation compared with commercially available silicon LDMOS
o Operational capability in the license-exempt 5.8 GHz ISM (industrial, scientific and medical) band as well as 5.3 GHz and 5.47 GHz U-NII (Unlicensed National Information Infrastructure) bands
o Superior linearity of better than 2.5% EVM at average power under a WiMAX signal at 25% drain efficiency covering an instantaneous bandwidth of 5.5 to 5.8 GHz.

Both transistors are available with "reference design" amplifier platforms.

As business and residential customers continue to demand increased capacity and functionality for wireless networks, these transistors can enable efficient power amplifiers in small base-station formats (access points) for last mile service utilizing WiMAX-based architectures. Such outdoor units can allow Internet service providers to maximize their ROI on spectrum due to the ability to offer tiered services (enabled by improved quality of service and wider channel bandwidths) to hundreds of broadband users from a single access point.

"The CGH55015F and CGH55030F are two great examples of new GaN transistors Cree developed to support the higher operational frequency and stringent efficiency and linearity requirements needed to enable next generation WiMAX base stations and access points," said Jim Milligan, Cree's director of RF and microwave products. "These 5 GHz transistors compliment the CGH35060 product that we are also releasing now to round out our 3.5 GHz GaN HEMT WiMAX product line. This 60 watt product is a direct result of customer feedback, and offers customers greater flexibility for 3.5 GHz WiMAX applications, particularly in Europe where remote radio heads (RRHs) are increasingly being used."

Additional information about the Cree products may be obtained by calling Cree at 919-287-7505 or by visiting

About Cree

Cree is leading the LED lighting revolution and setting the stage to obsolete the incandescent light bulb through the use of energy-efficient, environmentally friendly LED lighting. Cree is a market-leading innovator of lighting-class LEDs, LED lighting retrofit solutions, and semiconductor solutions for backlighting, wireless and power applications.

Cree's product families include recessed LED down lights, blue and green LED chips, high brightness LEDs, lighting-class power LEDs, power-switching devices and radio-frequency/wireless devices. Cree solutions are driving improvements in applications such as general illumination, backlighting, electronic signs and signals, variable-speed motors, and wireless communications.

For additional product and company information, please refer to

Contact: Michelle Murray
Corporate Communications
Cree, Inc.
(919) 313-5505
(919) 313-5943 (Fax)

More from Adhesives & Sealants

All Topics