Manual

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 1/2 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.
ORDERING DESIGNATIONS
TYPE NO. PRODUCT NO.
AIS 2/GPS 4-N 112000039
DM Mounting Kit 112000001
SM-MAS 110000196
DIPX 1000/1550 N-DC-H 200000749
PRO-DIPX 1000/1550 N-DC-H 200000799
SPECIFICATIONS
ELECTRICAL VHF
MODEL AIS 2/GPS 4
ANTENNA TYPE 1/2 λ antenna element
FREQUENCY 156 - 162.5 MHz
IMPEDANCE Nom. 50 Ω
POLARIZATION Vertical
GAIN Approx. 2 dBi 0 dBd
SWR Typ. < 1.5
MAX. POWER 25 W
ELECTRICAL GPS
ANTENNA TYPE Quadrifilar Helix Active antenna
FREQUENCY 1575 MHz
IMPEDANCE Nom. 50 Ω
POLARIZATION Circular right-hand
COVERAGE Hemispherical
GAIN
(in axial direction)
> 32 dBi
CROSS
POLARIZATION ATT
> 10 dB (typ.)
BUILT-IN AMPLIFIER
GAIN > 30 dB (typ.)
NOISE FIGURE < 3 dB (typ.)
P 1 dB
Approx. +10 dBm
SWR (output) ≤ 2.0
SUPPLY VOLTAGE 5 ±0.5 V DC
(3 V and 12 V respectively available on request)
SELECTIVITY > 20 dB down @ ± 100 MHz
CURRENT
CONSUMPTION
Approx. 44 mA
MECHANICAL
TEMP. RANGE -30° C → + 70° C
CONNECTOR N-female
WIND SURFACE Approx. 0.031 m²
WIND LOAD Approx. 50 N @ 160 km/h
COLOUR Marine white
MATERIALS Shroud : Polyurethane coated glass fibre
Flange : Chromed brass
TOTAL HEIGHT Approx. 1350 mm
WEIGHT Approx. 900 g
MOUNTING On 30-44 mm mast tube using stainless steel clamp
type SM-MAS or on deck using DM Mounting Kit