Ultrahigh-frequency transmission in wave guides

Ultrahigh-frequency, or microwave radiation is being employed more and more in the prosecution of the war, for communication and other specialized purposes. Unlike the power and audio frequencies, transmission in the ultrahigh-frequency region is accomplished best by wave guides, or tubular conductors. In order to make practical use of wave guides, it is necessary to decide upon the shape and size of the guides and upon the mode of transmission to be used. Here transverse-electric and transverse-magnetic modes of transmission in both rectangular and cylindrical wave guides are considered.