The MAS-2 multiport antenna system is designed for installations where space is at a premium and multiple communication circuits are needed. It provides five independent antenna modes. Two of these modes are NVIS modes for short range skywave circuits; two are low angle modes for medium range circuits; and the fifth mode is a high gain rotatable log periodic antenna for long range circuits. The relatively small installation area together with the five independent antenna ports make the MAS-2 ideally suited for congested antenna fields or sites where space is severely limited.
The MAS-2 multiport antenna system combines the four omnidirectional port capability of the SPQ-330 with the rotatable log periodic array (RLPA) features of the LPH-30 to provide a truly five port antenna system occupying the space normally required for a single antenna. All five ports may be used independently for transmit and receive. The RLPA has high gain, azimuth selection and permits communication between a fixed site and mobile stations such as ships and aircraft. It also features a torque tube and base mounted rotator thereby providing easy accessibility for inspections and maintenance. The spiral is a four arm equiangular design wound on a pyramidal structure formed by the center support tower and four catenaries. It is fed using an AP four-port hybrid and is protected under US Patent 5189434.
Obstruction lights, erection kit, repair kit with winch, safety climbing equipment. Coaxial cable, connector adapters and mating adapters. Computer controller with RS-232 interface. A 230V 50Hz unit is also available.