Circulators designed to accommodate critical millimeter-wave radar and communication bands

Smiths Interconnect has announced the Millitech brand HPC Series of high power circulators. The series is designed to accommodate critical millimeter-wave radar and communication bands. At K-band frequency and above these millimeter-wave circulators are able to provide protection, isolation, and duplex capability to high power transmitters and receivers. These circulators are ideal for traveling wave tube transmitter protection. The circulators are able to withstand 200W of continuous wave RF power, with peaks power ratings near 2,000W. Typically, these ferrite circulators exhibit low insertion loss below 1dB up to 40GHz and less than 2dB up to 110GHz. High isolations of at least 18dB in all bands from 18GHz to 110GHz are standard with these circulators, with port-to-port isolation greater than 26dB available for some configurations. VSWR ratings of 1.3:1, or less, are typical in all frequency bands, with some configurations providing less than 1.1:1 VSWR. Housed in high precision machined assemblies, the HPC Series circulators use industry standard rectangular waveguide input and output interfaces to provide the lowest loss and highest signal fidelity. The carefully designed assemblies also enables reliable performance under conditions of high power and extreme temperatures. These ferrite circulators can also be employed as isolators with the appropriate ports terminated.