A band separation filter for the 225-400 MCS band

The idealized insertion loss characteristics of a band separation filter is shown in Figure 1 with a block diagram of the physical configuration. Filters of this type have been built using lumped constant elements, however, these are not suitable at UHF when power handling capacity of the order of a kilowatt is required. In this paper the design of a band separation filter utilizing transmission line components is discussed. The results of VSWR, insertion loss and power tests performed on a filter of this type are presented.