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This paper investigates load-pull measurement of AlGaN/GaN high electron mobility transistors(HEMTs) at different numbers of gate fingers.Scalable small-signal models are extracted to analyze the relationship between each model’s parameters and the number of device’s gate fingers.The simulated S-parameters from the small-signal models are compared with the reflection coefficients measured from the load-pull measurement system at X-band frequencies of 8.8 and 10.4 GHz.The dependency between the number of device’s gate fingers and load-pull characterization is presented.
This paper investigates load-pull measurement of AlGaN / GaN high electron mobility transistors (HEMTs) at different numbers of gate fingers. Scalable small-signal models are extracted to analyze the relationship between each model’s parameters and the number of devices’s gate fingers. S-parameters from the small-signal models are compared with the reflection coefficients measured from the load-pull measurement system at X-band frequencies of 8.8 and 10.4 GHz. The dependency between the number of device’s gate fingers and load-pull characterization is presented .