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A traveling-wave high electron mobility transistor

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4 Author(s)
Anand, M.B. ; Dept. of Electr. & Comput. Eng., Syracuse Univ., NY, USA ; Ghosh, Prasanta K. ; Kornreich, P.G. ; Nicholson, D.J.

A traveling-wave high electron mobility transistor (THEMT) is proposed. The device is unique in that it includes an integral distributed load resistor and uses a HEMT as the active device. A rigorous analysis of the device is carried out, using a small-signal equivalent circuit model for an incremental section of the device. Losses and reflected waves are not neglected, as has been done in other work. Treating the device as a four-port network, closed-form expressions for S-parameters are derived. Theoretical calculations, using equivalent circuit parameter values for a HEMT reported in the literature, show that the proposed device is capable of exponential increase in gain with device width. Power gain of more than 10 dB at 50 GHz and remarkably flat response in the frequency range 10-100 GHz are shown to be achievable for a 1-mm-wide device

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:41 ,  Issue: 4 )