MAS-3 HF Multiport Antenna w/RLPA 2-30×3/4-30×2 MHz 106 ft
Frequency Range: 2-30, 4-30, 4-30, 2-30, 2-30 MHz
Gain: 7, 7, 7, 7, 9-12 dBi
VSWR: 2:1, 3.5:1 max, 2:1, 2:1, 2.5:1
Polarization: Elliptical, Vertical, Horizontal, Elliptical, Horizontal
Pattern: Omni, Omni, Omni, Omni, Directional
Size: 106′ H x 100′ L x 100′ W
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Description
Applications:
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.
Spec Sheet
Spec Sheet
SPECIFICATIONS |
PERFORMANCE |
---|---|
Port 5 Rotation Speed | 0.3 RPM |
Power, kW | 1 |
Wind | 100 MPH, no ice |
Port 5 VSWR | 2.5:1 |
Port 1 VSWR | 2:1 |
Port 3 VSWR | 2:1 |
Port 4 VSWR | 2:1 |
Port 1 Frequency | 2-30 MHz |
Port 4 Frequency | 2-30 MHz |
Port 5 Frequency | 2-30 MHz |
Port 2 VSWR | 3.5:1 Max, 2.5:1 Typical |
Port 2 Frequency | 4-30 MHz |
Port 3 Frequency | 4-30 MHz |
input Impedance | 50 Ohms |
Port 1 Directive Gain | 7 dB |
Port 2 Directive Gain | 7 dB |
Port 3 Directive Gain | 7 dB |
Port 4 Directive Gain | 7 dB |
Port 5 Directive Gain | 9-12 dB |
Port 5 Azimuth Pattern | Directional |
Port 1 Polarization | Elliptical |
Port 4 Polarization | Elliptical |
Erected Dimensions, H x L x W | Height 106 Feet; Length 100 Feet; Width 100 Feet |
Port 3 Polarization | Horizontal |
Port 5 Polarization | Horizontal |
Port 5 Application | Long Range |
Port 2 Mode | Low Angle |
Port 3 Mode | Low Angle |
Port 2 Application | Medium Range |
Port 3 Application | Medium Range |
Port 1 Rotation Speed | N/A |
Port 2 Rotation Speed | N/A |
Port 3 Rotation Speed | N/A |
Port 4 Rotation Speed | N/A |
Port 1 Mode | NVIS |
Port 4 Mode | NVIS |
Port 1 Azimuth Pattern | Omni |
Port 2 Azimuth Pattern | Omni |
Port 3 Azimuth Pattern | Omni |
Port 4 Azimuth Pattern | Omni |
Port 5 Mode | RLPA |
Port 1 Application | Short Range |
Port 4 Application | Short Range |
Input Connector | Type “N” |
Port 2 Polarization | Vertical |
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