MESFET nonlinearities applied to predistortion linearizer design

Abstract
Three different circuit topologies of predistortion linearizers are proposed using MESFETs biased at low drain bias. The design of a C-band linearizer using two 1- mu -gate-length devices is detailed, and the achieved results compare favorably with conventional designs which use Schottky diodes. The linearizer reduced by 10 dB the intermodulation products of a 10-W power amplifier operating at 6 GHz, and up to 4-dB back-off.> Author(s) Tupynamba, R.C. Lab. de Microelectronica, Sao Paulo Univ., Brazil Camargo, E.

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