Cree hasĀ releasedĀ a new suite of Verilog-A proprietary non-linear device models for its GaN RF devices, developed for use with leading RF design platforms from Agilent ADS and AWR Microwave Office.
The new device models support more complex circuit simulations including modulation envelope analysis for use in the latest innovative broadband and multi-mode RF power amplifiers for 4G cellular telecommunications. The cross-platform models will be available on the Cree Model portal in connection with the upcoming 2012 IEEE International Microwave Symposium to be held June 19 – 21 in Montreal, Canada.
āThe release of this new suite of device models enables RF design engineers to predict non-linear performance using harmonic balance, conduct robust transient analysis as well as use āreal-worldā arbitrary modulation signals with envelope simulation for Creeās GaN HEMT devices,ā said Jim Milligan, director RF and microwave, Cree. āThe Verilog-A models, together with envelope simulators, allow designers to directly investigate higher efficiency circuit approaches, such as Doherty amplifiers, to improve adjacent channel power ratios, spectral re-growth and error vector magnitude, while assessing if amplifier performance meets spectral mask requirements for LTE deployments. As these models also take advantage of multi-core processors, simulation times can be greatly reduced.ā
āTransient analysis allows insight into switched-mode power amplifier configurations that may also be driven directly from digital signals,ā said Ray Pengelly, RF business development manager, Cree.Ā āCombined with such approaches as Chireix out-phasing, unprecedented efficiencies of greater than 70 percent have been demonstrated.ā
The models are available free to Creeās RF customers.
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