https://www.dolphmw.com/products/industrial-microwave-transitions/ Dolph Microwave provides the Industrial Microwave Transitions from double-ridge waveguide to rectangular waveguide with standing wave≤1.15. The transition length, flange, material, surface treatment and electrical specifications of the double-ridge waveguide to the rectangular waveguide transition can be customized according to user requirements. Microwave components for industry microwave is 915 and 2450MHz.