Dolph Microwave series model's frequency are covering from 2.60 GHz to 110GHz. Usually, in accordance with drive modes, they can be classified into sub-electric and manual; If by structure, they are classified into sub-E and H-waveguide transfer switches, with rectangular waveguide transfer switches and double ridge waveguide transfer switches. https://www.dolphmw.com/products/double-ridged-waveguide-switches/All Rights Reserved