Cart 0
SA-300 GPS Antenna for Marine & Stationary Application

SA-300 GPS Antenna for Marine & Stationary Application


  • $54.98
  • Save $5

SA-300 is an active GPS antenna with high gain of 27 dB and low current of 27mA, supporting RG-58 A/U cable as long as 50m. The default cable length is 10 meters with BNC connector.


With the compact polycarbonate radome enclosure and the waterproof/weatherproof physical construction, SA-300 is deliberately designed for both navigators and researchers who often need to use GPS in harsh environments, such as strong shock or vibration, fierce wind, and even continuous exposure to water and sunlight.

Additionally, SA-300's stainless pole mount not only enables the antenna to receive GPS signals steadfastly, but also enables the cable to be threaded, protecting itself from environmental damage. Both of the industrial standard TNC connector and 1"-14" straight thread perfectly fit the typical marine mount, enhancing multifunction and application for SA-300. Furthermore, through the inventive integration of dual amplifiers and dual filters (saw filter + bandpass filter), SA-300 provides excellent resistance to RF signal interference without compromising its gain, which helps ensure stable performance even in RF signal-jamming environment.


Physical Characteristics
Construction: Polycarbonate radome enclosure, sealed with weatherproof rubber O-ring in-between; Center fed with TNC connector for antenna output
Antenna Dimensions: 4.5" in diameter & 2.9" in height
Weight: 220 grams w/o cable
Color: White
Cable & Connector
Cable Length: 10 m RG58 A/U with 15-50 m optional; Cable connectors hermetically molded plastics for waterproof and stain relief
Connector Available: BNC (standard), other types (optional)
Standard Mounting: External flagpole type mast mount 1"-14" threaded mast
Optional Mounting:
  1. Cabin roof-mount with stainless steel base & shaft
  2. Rail side mount with stainless rod
Antenna Element
Polarization: R.H.C.P. (Right Hand Circular Polarization).
Absolute Gain @ Zenith: +5 dB typically
Azimuth Coverage: 360º
Gain @ 10º Elevation: -1 dB typically
Azimuth Coverage: 360º
Axial Ratio: 3 dB max.
Output VSWR: 1.5:1 max.
Amplifier Element
General: L1 frequency, 1575.42 MHz +/-1.023 MHz
LNA Gain: 30 dB typically
Bandwidth: 2 MHz min.
Noise Figure: 2.0 max.
Out-of-Band Attenuation: 30 dB min. @ Fo +/- 50Mhz
Current Consumption: 27mA +/- 3mA
Overall Performance
Center Frequency: 1575.42 MHz
Gain: 27 dB typ.
Noise Figure: 2.0 max.
Axial Ratio: 3dB max.
VSWR: 2.0 max.
Output Impedance: 50 Ω
Electrical Characteristics
Supply Voltage: 4.5-5.5V DC
Power Consumption: 27mA @ 4.5 volts, 0.12 watts typ. < 0.2 watts max.
Environmental Characteristics
Operating Temperature: -30ºC to +85ºC
Storage Temperature: -40ºC to +90ºC
Operating Humidity: 95% RH, non-condensing
Waterproof: 100% waterproof at the rating of IP66

We Also Recommend