Model SB-108
Shipboard Antenna

Frequency Range: 118-520 MHz
Gain: 0 dBi (minimum)
VSWR (max): 2.0:1 136-174, 2.5:1 225-520 MHz (50 Ω)
Polarization: Vertical

View Product Specs PDF

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SKU: SB-108 Category:


The SB-108 VHF/UHF antenna was designed for line of sight voice or data communication circuits. The antenna is
vertically polarized and has a frequency range of 118-520 MHz with a 200 watt average 500 watt peak power capacity. The antenna is designed with a single antenna element to minimize the amount of antennas and coax runs installed on a ship. The rugged design of the SB-108 will provide many years of excellent service in extreme conditions commonly found in shipboard conditions.

Spec Sheet


Frequency Range 118-520 MHz
VSWR (max) 2.0:1 136-174, 2.5:1 225-520 MHz (50 Ω)
Gain 0 dBi (minimum)
Polarization Vertical
Vertical -3dB Beamwidth 70° (minimum)
Horizontal -3dB Beamwidth 360°
Azimuth Ripple +/- 0.5 dB
Power Input 200 Watts (ave), 500 (PEP)


Connector N Female
Mounting ¼” bolts on a 3.88” bolt circle
Radome Synthetic Polymer
Radome Diameter 8” (203.2 mm) O.D.
Base Diameter 4.5”(114.3mm)O.D.
Color Shipboard Grey (standard)
Length ~40”(1016mm)
Weight ~15 lbs (6.8 kg)
Wind Survival 100 MPH (162 km) with 1” radial ice
Lightning Protection Direct Ground
Shock MIL-S-901C, Grade A, Class 1
Vibration MIL-STD_167-1, Type 1