Typical Gain and VSWR curve
For the VHF band (156 – 162.5 MHz)
VSWR Gain
AIS 2/GPS 4
Dual Band Antenna for the AIS system
Description
- This active antenna has been designed for use by the Universal Shipborne Automatic Identification System (AIS) on all waterways.
- The antenna consists of a high-performance glass fibre encapsulated antenna element and an active GPS antenna.
- The latter is built into the bottom part of the antenna together with a diplex filter. Only one down lead cable is therefore necessary.
- The antenna element is a ½ λ antenna for the maritime VHF frequency range 156 – 162.5 MHz.
- The GPS antenna has a full hemispherical coverage and a built-in high-gain, low-noise amplifier.
- The necessary supply voltage (5 V DC) for the amplifier is delivered through the down lead coaxial cable. Up to 30 m of RG 214/U coaxial cable can be used between the antenna and the receiver/transceiver.
- By careful choice of materials, the AIS 2/GPS 4 is designed to withstand the roughest of climate conditions, ensuring many years of trouble-free service.
Specification
| Electrical | |
| Model | AIS 2/GPS 4 |
|---|---|
| Frequency | 156 – 162.5 MHz |
| Antenna Type | ½ λ antenna element |
| Max. Input Power | 25 W |
| 3 dB Beamwidth, H-Plane | Omnidirectional |
| Polarisation | Vertical |
| Impedance | 50 Ω |
| Gain | 0 dBd (2.2 dBi) |
| VSWR | < 1.5:1 |
| Environmental | |
| Operating temperature range | -30 °C to +70 °C |
|---|---|
| Ingress Protection | IP66 |
| Mechanical | |
| Wind Area | 0.031 sq. m / 0.33 sq. ft |
|---|---|
| Connection(s) | N(f) |
| Materials | Shroud : Polyurethane coated glass fibre Flange : Chromed brass |
| Colour | Marine white |
| Historic Brand | Amphenol Procom |
| Height | Approx.1350 mm / 53.15 in. |
| Wind Load | 50 N (160 km/h) |
| Weight | Approx. 0.9 kg / 1.98 lb. |
| Mounting | On 30 – 44 mm mast tube using stainless steel clamp type SM-MAS or on deck using DM Mounting Kit |
Ordering Codes
| Model | Product No. |
|---|---|
| Dual Band Antenna for the AIS system | 112000039 |
Additional Information
Radiation pattern for the VHF band (156 – 162.5 MHz)
Typical radiation pattern (E-PLANE)
Typical radiation pattern (H-PLANE)
Gain and Noise curves
Typical response curves and radiation pattern for the GPS-Part (1575 MHz)
Vertical radiation pattern
Mounting on flat surfaces
All dimensions are given in mm
Alternatively, DIPLEXER DIPX 1000/1550-DC-H can be used. Either filter to be ordered separately.
Mounting Kits
Standard Mounting Kit included.
DM Mounting Kit for Deck Mount to be ordered separately
SM-MAS Mounting Kit for Side Mount and Mast Mount to be ordered separately.
All dimensions are given in mm.
PROCOM A/S reserves the right to
amend specifications without prior notice
PROCOM A/S • Smedetoften 12
DK 3600 Frederikssund • Denmark
Generated : 2026-06-23
Version 1