60 GHz-band monolithic HEMT amplifiers using BCB thin-film layers

摘要

Millimeter-wave monolithic microwave integrated circuits (MMICs) for commercial use have attracted much attention in applications such as 60 GHz wireless LANs and 76 GHz automotive radar.We have developed 60 GHz-band monolithic high-electron mobility transistor (HEMT) amplifiers adopting benzo-cyclo-butene (BCB) thin-film layers on GaAs substrates. The adoption of the BOB thin-film layers enabled the MMIC to incorporate both a thin-filmmicrostrip line with the advantages of great flexibility in layout and small size, and a coplanar waveguide with the advantage of low loss.The newly developed MMIC is 22.5% smaller and the frequency bandwidth 11 times wider than a conventional MMIC. A gain of 15.8 dB at 59.5 GHz was obtained.