Siretta Alpha 4A

IP67 Rated GPS Antenna 28dB Waterproof, Self Adhesive Antenna

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Key Features
  • IP67 Rated
  • 26dB pre-amplifier
  • waterproof
  • RoHS compliant
  • Compact
  • Adhesive Base

The Alpha 4A is an extremely compact, self adhesive, IP67 rated, GPS antenna. Its 37 x 33mm footprint makes the Alpha 4A fit onto most surface sizes very comfortably, and with a modest height of only 13mm, it also provides an unobtrusive profile. The Alpha 4A comes with a strong self-adhesive base that provides a firm fixation to most flat surfaces, including: metal, glass, wood and plastic. Furthermore, its IP67 rating makes this antenna well suited to the harsher outdoor environment that GPS applications are often subject to. The Alpha 4A can be used for a host of different indoor or outdoor GPS applications: vehicle/fleet/asset tracking, mobile applications or general positioning purposes.

The Alpha 4A has a center frequency of 1575.42MHz for GPS compatibility. The built in Low Noise Amplifier (LNA) provides a 26dB gain for superior GPS performance necessary for strong signal reception from visible satellites; as well as influencing a shorter time for satellite fixing.

The Alpha 4A is supplied, as standard, with a 5 meter RG174 coaxial cable, terminated with an SMA male connector. Custom cable lengths and alternative connector types can be supplied for volume requirements


Key Specifications - Antenna

Impedance: 50 ohm
VSWR: <2.0:1
Centre frequency: GPS 1575.42MHz
Polarization: RHCP
Filter Insertion loss: <3dB

Key Specifications - LNA

Gain: 26 ± 2dB
VSWR: <2.0:1
Noise Figure: <1.3
Filter Insertion Loss: <3dB
Supply Voltage: 2.2 to 5V DC
Current Consumption: 10 to 26mA
Ex Band Attenuation: 12dB@CF+50MHz/

Key Specifications - Mechanical

PCB Dimensions: 20 x 20 x 4mm
Antenna Dimensions: 37.6 x 33.8 x 13mm
Cable: 5 metre RG174
Connector: SMA male
(other options available on volume request)
Mounting method: Self adhesive
(Magnetic base available on volume request)

Key Specifications - Environmental

Operating Temperature: -40 to + 85°C
Relative Humidity: Up to 95%
Ingress Protection IP67 Rated
Environmentally Friendly: RoHS compliant
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