to product finder

GPS AntennasAIS 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.

Specifications

Electrical

Model

AIS 2/GPS 4

Frequency

156 - 162.5 MHz

Antenna Type

½ λ antenna element

Max. Input Power

25 W

Polarisation

Vertical

3 dB Beamwidth, H-Plane

Omnidirectional

Impedance

50 Ω

Gain	0 dBd (2.2 dBi)

VSWR

< 1.5:1

Mechanical

Connection(s)

N(f)

Materials

Shroud : Polyurethane coated glass fibre
Flange : Chromed brass

Colour

Marine white

Wind Area

0.031 sq. m / 0.33 sq. ft

Wind Load

50 N (160 km/h)

Height

Approx.1350 mm / 53.15 in.

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

GPS Antenna

P1dB (GPS Amplifier)

Approx. +10 dBm

Noise Figure (GPS Amplifier)

< 3 dB (typ.)

Cross Polar Discrimination (GPS)

> 10 dB (typ.)

Gain (GPS Antenna)

32 dB

Selectivity (GPS Amplifier)

> 20 dB down @ ± 100 MHz

VSWR (GPS Amplifier)

< 2.0:1

Frequency (GPS)

1575 MHz

Power Supply (GPS)

5 ±0.5 V DC (3 V and 12 V respectively available on request)>

Current Consumption (GPS Amplifier)

Approx. 44 mA

Polarisation (GPS)

RHCP

Impedance (GPS)

50 Ω

Environmental

Operating temperature range

-30 °C to +70 °C

Ingress Protection

IP66

Ordering Designations

Model	Product No.
AIS 2/GPS 4-N	112000039
Accessories
DM Mounting Kit	112000001
SM-MAS	110000196
DIPX 1000/1550 DC-H	200000749
PRO-DIPX 1000/1550 DC-H XS	200001998

Typical Gain and VSWR curve

For the VHF band (156 - 162.5 MHz)

VSWR Gain

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.

to product finder

GPS AntennasAIS 2/GPS 4

Description

Specifications