AV850M1-00

Alpha's AV850M1-00 MMIC voltage variable attenuator is a balanced configuration incorporating Lange couplers at input and output.The attenuator has a typical insertion loss of 2.5 dB over the 1840 GHz band with a worst-case insertion loss of 3.5 dB across the full 1850 GHz band. The attenuation range is 35 dB over the full 1850 GHz band while typical I/P and O/P return loss is better than 13 dB for all attenuation states. The chip uses Alpha's proven 0.25 m MESFET technology and is based upon MBE layers and electron beam lithography for the highest uniformity and repeatability. The MMICs employ surface passivation to ensure a rugged, reliable part with through-substrate via holes and gold-based backside metallization to facilitate a conductive epoxy die attach process. All chips are screened for insertion loss, full attenuation and I/P and O/P match over the 1850 GHz band for guaranteed performance.