East Coast Microwave is stocking cryogenic isolators from DiTom Microwave. The three-port ferrite devices are designed to operate at cryogenic temperatures at or below 77K and provide high isolation in one direction and low loss in the other. Cryogenic isolators are ideal for use in laboratories, quantum computing and aerospace applications.
For example, the D3I4080Y cryogenic isolator operates from 4 to 8GHz. It can handle: an average forward input power of up to 30W; a peak input power of 50W; and a reverse input power of 2W. The component provides more than 16dB of isolation and has an insertion loss of less than 0.4dB. It is available in a module measuring 1.0 by 1.0 by 0.5in and features SMA (male/female) connectors.