Foreword, Apr. 1975

The idea for this Special Issue on Microwave Communications grew out of a desire to couple the device and circuit designers within the microwave community more closely to the systems that utilize the outputs of their technologies. Accordingly, this Special Issue has been assembled in order to describe systems either currently operating, or under development, whose concept was stimulated, and existence made possible, by devices and circuits developed by members of the MTT Society and the organizations they represent.