Cree Announces Large Signal Accuracy
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Cree, Inc., a leading global supplier of gallium nitride on silicon carbide (GaN-on-SiC) high electron mobility transistors (HEMTs), has released a new application note describing the remarkable accuracy of its large signal models for RF power transistors, which allow RF design engineers to reduce PA design iterations, design time, and development costs.
Cree’s GaN HEMT devices are growing increasingly popular in applications including: broadband amplifiers, cellular infrastructure, tactical and satellite communications, and test instrumentation due to their high efficiency, high gain, and relatively simple matching characteristics. However, RF power devices like these are notoriously difficult to predict the large signal performance of due to self-heating and the complex dependence of nonlinearity component parameters on signal level, thermal effects, and ambient conditions. Consequently, design engineers must either develop hardware and conduct time-consuming and potentially inaccurate load-pull measurements or rely on the accuracy of large signal models to evaluate such devices in their simulation environments.
To put designers at ease and spare them the time and cost of conducting load-pull measurements, as well as the risk of generating defective data, Cree carefully compared measured and modeled data for its 100W and 200W GaN-on-SiC high electron mobility transistors. Verified using a standard load pull system at optimal impedances over multiple frequencies, the results demonstrate the exceptional accuracy with which Cree’s proprietary large signal models represent actual device performance. Further, in addition to providing RF design engineers with valuable assurance and reducing design time and development costs related to load-pull measurements, Cree’s highly accurate models also allow engineers to conduct in-depth “what-if” analyses that can close layout links and enable faster design cycles and more first-pass design successes.
For more information about Cree’s extremely accurate large signal models for its GaN-on-SiC HEMTs, including detailed measured vs. modeled performance data, please visit mwrf.com/active-components/load-pull-validation-large-signal-cree-gan-field-effect-transistor-fet-model to download the “Load Pull Validation of Large Signal Cree GaN Field Effect Transistor (FET) Model” application note. To download Cree’s large signal models for use with simulation tools, please visit http://www.cree.com/RF/Tools-and-Support/Model-form to request access to Cree’s RF Portal. For all other inquiries about Cree RF products and foundry services, please visit www.cree.com/RF or contact Sarah Miller, Marketing, Cree RF Components, at sarah_miller@cree.com or 919-407-5302.
Christine Stieglitz
PR Executive | BtB Marketing Communications
christine.stieglitz@btbmarketing.com
900 Ridgefield Drive, Suite 270, Raleigh, NC 27609 | 919.872.8172
Cree® is a registered trademark of Cree, Inc.
