MMICs for K band low noise receivers

The two basic parts of a receiver operating in K band: a low noise amplifier and a mixer, have been designed and fabricated using Philips Microwave Limeil process D02AH. The circuits presented in this paper show very interesting results. For the low noise amplifier three stages were used obtaining good noise figures and gain results. The first two stages employ series feedback, and the last one uses parallel feedback. For the mixer, a recently proposed scheme, based on drain mixing was applied. On wafer measurements for both circuits are shown. The results show a reasonable performance and address weak points in modelling and technology for the design of enhanced prototypes