Waveguide networks operating in the millimeter wave region to separate the 62 transmitter and 62 receiver frequency spectra at each end of every waveguide transmission line are described. The overall loss of these networks for the various channels has been designed to complement the shape of the transmission medium loss in order to yield maximum repeater spacing. General descriptions of the design and performance of all filters used in the complete channelization array are given.

This paper describes the essential features and the performance of the AR6A microwave transmitter and receiver. Subsystems that are major contributors to repeater noise are explained in detail. Design objectives for each of these units are given and compared to typical results obtained from measurements. Transmitter linearity was improved substantially through the use of predistortion. The thermal noise contribution of the receiver was reduced by use of a new low‐noise microwave preamplifier.