Isolators and Circulators

The line holds three isolator series (115 Series Faraday isolators, 116 Series compact Faraday isolators, 178 Series Y-junction isolators) and two circulator series (179 Series Y-junction circulators, 180 Series multi-junction circulators), covering the standard waveguide bands from 18 GHz to 325 GHz. The 115 Series uses Faraday rotation in a broadband dielectric-waveguide structure to give 20 to 25 dB of isolation from 18 to 325 GHz, with insertion loss as low as 1.0 dB in K-band. The 178 and 179 Series are H-plane Y-junction designs with insertion loss down to 0.4 dB; the circulator version handles 5 W average and 1 kW peak. All models use MIL flanges (UG-595/U through UG-387/U-M) and fit straight into an existing waveguide run, and Mi-Wave will adapt band, power rating or mechanical interface to order. Before you specify, decide whether reverse isolation (isolator) or port routing (circulator) is the need, check the isolation figure against the return loss of the load, and note that the Y-junction parts are rated over a narrower temperature range than the Faraday parts at the upper bands.