Abstract

In this paper a single balanced mixer, suitable for K band applications, is described. The prototype is realized usingan InP process and it is based on Heterojunction Interband Tunnel Diodes (HITDs). The circuit, consisting of a pair of HITD sconnected to a coplanar Lange coupler, is optimized by a proper diode scaling in the 19-26 GHzband, providing an IF ranging from zero up to 7GHz. Measurements highlight a conversion loss ranging from 6dB to 10dB and an IIP3 of 8dB in the desired band. Due to the diodes characteristic no DC supply is needed and the functionalityis achieved with a LO power of -2dBm.The results also show a good agreement between the experimental data and simulations.