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VMB - 3512 Multi-Band Antenna: Quick Reference Data

Model -- VMB-3512    

Name: Broadband Vehicular Whip Antenna
Category: VHF Antennas
Photo : VMB-3512
Height: 138 in (3.50 M)
Frequency Range: 30 - 512 MHz
Features:
  • Extremely wide bandwidth

  • Performs well, with or without a ground plane

  • Rugged and reliable design

  • Base mount for placement flexibility

  • High voltage isolation for safety

  • Easy assembly/disassembly

Description:

The VMB-3512 is a multi-band vehicular whip antenna system designed to provide VHF and UHF communications for a range of military applications, such as the JTRS program. It is designed for use with today's cutting edge, wide-band, frequency agile radios operating within its 30-512 MHz band and can be used to replace a multiple antenna setup. The VMB-3512 boasts a power handling capability of 100 watts and less than 3.5:1 VSWR across the entire operating band.

 The VMB-3512 whip comes in two pieces which easily thread together to create a dipole-style antenna system with integral matching networks, all housed within fibreglass envelopes. The whip threads onto the base support spring which has an aluminum flange for mounting to a standard vehicular mount.

EMP (electro-magnetic pulse) and high voltage isolation are also incorporated into the VMB-3512. The upper whip section provides high voltage isolation to 20kvrms providing safety to personnel and equipment in the case of an accidental strike of the antenna to an overhead power line. An eye protection device at the tip of the antenna provides further safety to the user..

Electrical Characteristics

Frequency Range: 30 MHz to 512 MHz
Polarization: Vertical
Power Handling: 100 Watts continuous
Radiation Pattern: Omnidirectional
Gain:

-5.0 TO +2.0 dB relative to a resonant quarter wave monopoles over 30 to 512 MHz

VSWR: 3.5:1 maximum

High Voltage:Protection

Top Element 20 KV rms Lower element: 10 KV rms to MIL-STD-202
Input Connection/or: Type - N (STD), (BNC Optional)

Mechanical Characteristics

Height / Length: 138 in ( 3.5 M)
Weight: 10.5 Lbs. (4.31 kg)
Color: Type II Green per MIL-C-46168 (to customer request)
Mounting: Mid-mount flange has four 0.453 in. dia. holes (for 3/8 in. bolts) and 4.50 in. bolt circle 

Environmental Characteristics

Temperature: -60°F to 160°F (-51°C to 71°C)
Wind Velocity  50 mph (80 kph) operating
Impact  25 blows at 25 mph on 4 X 4 oak beam
 

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