Profile: Arra, Inc. designs and manufactures microwave and RF products for commercial, military, scientific and educational applications. We offer co-axial devices such as attenuators, couplers, dividers/combiners, filters, line stretchers, path simulators and phase shifters. Our waveguide devices include bends, bulkhead feed-thrus, couplers, flexible waveguide, horns, phase shifters, pressure windows, pressurization sections, shorts, straight sections, switches, tees, terminations and twists. MT-1 consists of a complete microwave system capable of transmitting and receiving microwave signals in X band. It is composed of three electronic components, a training manual, and various other microwave components and accessories. It needs no additional meters, instruments or components in order to demonstrate microwave phenomenon. It operates from a 110 volt 60 cycle source.