Design
The MCS Inc. engineering and sales department would be pleased to support you with any selection or technical help you may require. Please don’t hesitate to contact us. The following is a guide to help you.

            Properties - The properties of waveguide are determined by their physical internal dimensions which limit                                     their frequency handling capabilities. The chart located on the back cover of this catalog                                     list the common types used.
            Designations - Waveguides are designated by many codes as shown in the first five columns of the                                     chart, in the United States the WR designator is typically used and will be used through out                                     this catalog.
            Frequency Range – The frequency ranges are governed by the internal dimensions. The chart shows                                     standard frequency ranges for the different waveguides. Many waveguide devices do not                                     operate at the full waveguide band of this chart. Please check the individual device                                     specification sheet.
            Insertion loss - Insertion loss is the resistive and reflective losses that occur in practical waveguide                                     systems. The chart shows the resistive losses for waveguide sections and assemblies.                                     Reflective losses in waveguide assemblies can generally be disregarded due to the near                                     perfect transmissions. However in large waveguide systems consisting of many waveguide                                     sections and devices, the reflections need to be controlled or insertion loss ripple will                                     develop. Contact MCS for more information.
            Power Handling – Waveguides can handle very high power levels. The level is dependant on the                                     particular device, check the data sheets for the device you require. If you require a device                                     that handles more power than listed, please contact MCS.
            Waveguide Bends - Bends in waveguide are designated as either E-Plane or H-Plane.

            Waveguide Twist - In order to change the plane of the waveguide a twist is often used.



             Flanges – Commercial flange types are shown below. They are Square, CPR, CMR, and Choke. The                                     choke types offer lower RF leakage. Military flange are to numerous to list in this                                     publication. If you can’t determine the military or commercial flange you require, MCS                                     would be happy to assist you. The devices listed in this catalog have specified flange type,                                     for other types contact MCS sales



            Waveguide assemblies – MCS can produce custom waveguide assemblies to your specifications or let                                     us do the work in designing and specifying the assembly you require.

Information required to specify the assembly required

            1. Frequency – low and high frequency requirements.
            2. Waveguide designation, if known or mechanical dimensions.
            3. Flange style
            4. Mechanical dimensions - dimensions of interface points