  The DARTWARS project has the goal of developing high-performing innovative
travelling wave parametric amplifiers with high gain, large bandwidth, high
saturation power, and nearly quantum-limited noise. The target frequency region
for its applications is 5 - 10 GHz, with an expected noise temperature of about
600 mK. The development follows two different approaches, one based on
Josephson junctions and one based on kinetic inductance of superconductors.
This contribution mainly focuses on the Josephson travelling wave parametric
amplifier, presenting its design, preliminary measurements and the test of
homogeneity of arrays of Josephson junctions.
