Abstract

This paper describes different approaches to develop very low noise amplifiers for the next generation of radio telescopes. We do research to evaluate which process is most suitable to be used in the radio telescopes, we also make novel designs that will make the most of the present processes. To evaluate the processes we designed and measured comparable designs in the different processes. For this the focus has been mainly on the III/IV processes GaAs and InP. This paper will discus three different designs. Two comparable designs to evaluate the processes and the third is a differential design.