1. AIS system & boat manages the double frequency GPS/VHF antenna or GPS/ orbcomm antenna.
2. Physical condition
- Constructions: Polycarbonate radome, rubber-O-ring between top radome and screw base for waterproof
- Dimensions: 47.2mm(Dia.) x 38mm(H)
- Weight: 100grams (with 5M cable & connector).
- Color: Standard in Black
- Mounting: Bulkhead mount with 0.46 inch threaded wing nut.
3. Cable & connector:
- RF cable: 5 meter RG174/U (standard) other length (optional).
- Pulling strength: 6 Kg @ 5sec. molded plastic on connector end for strain relief.
- Connector available: SMA/SMB/MCX/MMCX/GT5/FME.
- Optional: universal connector adapter (FME to TNC/ BNC/ SMA/ SMB/ MCX).
4. Antenna element:
- Center frequency: 1575.42 MHz +/-1.023 MHz.
- Polarization: R.H.C.P. (right handed circular polarization).
- Absolute gain @ zenith: +5 dBi typical.
- Gain @ 10o elevation: -1 dBi typical.
- Axial ratio: 3 dB max.
- Output VSWR: 1.5 max
- Output impedance: 50 ohm
5. Low noise amplifier:
- Center frequency: 1575.42 MHz.
- Power gain: 28db +/-4.5db.
- Bandwidth: 10MHz min.
- Noise figure: 1.5 min.
- Outer band attenuation: 3 dB max.
- Supply voltages: 2.5~5.5V DC
- Current consumption: 2.5V: 6.6mA/ 3V: 8.6mA/ 4V: 12.6mA/ 5V: 16.6mA.
- Output impedance: 50W ohm.
6. Overall performance: (antenna element, LNA & coax cable.)
- Center frequency: 1575.42 Mhz.
- Gain: at 90° 30 ± 4.5dBi (cable loss).
- Mounted on the 60mm x 60mm square ground plan.
- Noise figure: 2.0 max.
- Axial ratio: 3 dB max.
- Bandwidth: 2MHz min.
- VSWR: 2.0 max.
- Output impedance: 50W ohm.
7. Environmental:
- Operating temperature: -40°C ~ +85°C.
- Storage temperature: -50°C ~ +90°C.
- Relative humidity: 95% non-condensing.
