A Compact 960/1800 Telephone Channel 6 GHz Radio Relay Equipment

A new 6 GHz radio relay equipment is described which includes a number of broadband microwave integrated circuits. These have been constructed using novel techniques which enable a number of microwave elements to be included on a single substrate. Use of integrated circuits has resulted in a compact equipment arrangement, which is housed in a slim rack configuration. Output powers of up to 1 W are achieved by a multi-stage IMPATT diode amplifier or up to 10 W by a high efficiency travelling wave tube. The two types of amplifiers and their associated power supplies are directly interchangeable, resulting in a versatile system suitable for either 960 or 1800 telephone channel operation.