Profile: EM Design, LLC specializes in the design & fabrication of RF & microwave components, systems and sub-systems. We deal with antennas, antenna polarizers, circulators, waveguide loads, co-axial loads, and microwave pulse compressors. The high power S band circulators are used for isolating reflection from resonant loads such as accelerators, or other similar devices. The circulators are set for the 2.998 GHz frequency, but can be readily optimized for other frequencies, including 2.856 GHz. The model 102637 has very high average power 4 port waveguide circulator, & is used for isolating reflection from resonant loads such as accelerators or other similar devices. It is broadband, but has narrow band specifications also.