The MAS 5 multiport antenna system is designed for installations where space is at a premium and communication requirements are for several circuits simultaneously having a variety of path lengths. 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 port is a high gain rotatable log periodic antenna for long range circuits. The relatively small installation area together with the five independent antenna ports makes the MAS-5 ideally suited for congested antenna fields or sites where space is severely limited.
Features:

The MAS-5 Multiport Antenna system combines the four omnidirectional port capability of the SPQ-330 with the Rotatable Log Periodic Array (RLPA) features of LPH-24 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 or receive. The RLPA has high gain, azimuth selection (computer control optional) and permits communication between a fixed site and mobile station such as ships and aircraft. It also features a torque tube and base-located rotator thereby providing high reliability and 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.

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The MAS-3 multiport antenna system is designed for installations where space is at a premium and the communication requirements is for several circuits simultaneously having a variety of path lengths. 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 makes the MAS-3 ideally suited for congested antenna fields or sites where space is severely limited.

Features:

The MAS-3 multiport antenna system combines the four omnidirectional port capability of the SPQ-330 with the rotatable log periodic array (RLPA) features of the LPH-1A 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 or 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-located rotator thereby providing high reliability and 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 as protected under US Patent 5189434.

Optional Equipment:

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.

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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.

Features:

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.

Optional Equipment:

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.

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The MAS-1 HF antenna is designed for installations where space is at a premium and the communication requirement is for simultaneous operation on short, medium, and long range HF skywave circuits. The relatively small sized and multifunctional operational capability makes the MAS-1 ideally suited for rooftop or similar limited space sites. A forearm pyramidal spiral is fed with a four port hybrid, providing two short range and two medium range omnidirectional ports. A rotatable log periodic provides a directional fifth port for a long range circuit. The MAS-1 provides full duplex operation on a short range and medium range circuit simultaneously along with half duplex operation on a long range circuit.

Features:

The MAS-1 is capable of operating as five (5) separate antennas integrated into one structure. All inputs are isolated from each other permitting full duplex operation on two separate circuits, or three half duplex and one receive only circuit, plus an additional half duplex circuit on the rotatable log periodic. The rotatable log periodic is lightweight and composed primarily of aluminum. The antenna is foreshortened in both length and width to minimize physical size and turning radius. The performance has been maximized consistent with its size. The spiral is a four arm equiangular design wound on a pyramidal structure formed by the center support tower and four catenaries. The catenaries are dielectric with prepositioned element attachment clamps. The elements are constructed from jacketed cables that provide protection from the environment. The support tower is a bolted, all aluminum structure. The antenna is protected under US Patent 5189434.

Optional Equipment:

Obstructions 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.

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