Capacitive-division traveling-wave amplifier with 340 GHz gain/bandwidth product

Abstract

We report capacitive-division traveling-wave amplifiers having measured midband gains of 8 dB with a 1-98 GHz 3-dB-bandwidth, and 11 dB gain with a 1-96 GHz bandwidth. The capacitive-division topology raises the input Q of each cell, giving the amplifier increased bandwidth over conventional designs with the same active device technology; using 0.15-/spl mu/m gate length InGaAs/InAlAs HEMTs, bandwidths exceeding 150 GHz are feasible.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>