Interstitial Channels for Doubling TD-2 Radio System Capacity

Abstract

The TD-2 microwave radio relay system at the present time provides six broadband channels in each direction of transmission in the frequency band between 3700 and 4200 me, each channel being capable of transmitting several hundred voice circuits. This paper describes arrangements and some of the technical problems involved whereby the number of broadband channels can be doubled with no significant penalty to the existing channels.

TD-3 System: Networks

“…In the microwave receiver, selective microwave networks are re quired to efficiently couple as many as six receivers to a common waveguide, to prevent adjacent channel interference 2 and to suppress interfering frequencies which would degrade the system's performance.…”