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Part Number -- VD-97-00592 |
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| Name: | Near Vertical Incident Skywave (NVIS) Antenna |
| Category: | High Frequency Antennas |
| Diagram(s): | Dimensions and Mounting Details |
| NATO Stock Number (NSN): | 5985-00-116-6130 |
| Height: | 15 feet assembled (30 feet with Expansion Kit) |
| Frequency Range: | 2 MHz to 30 MHz |
| Features: | * Lightweight and
easy to carry * Rugged field-proven design * Quick and easy to erect * Vehicular and manpack usage * Optional expansion kit available for increased radiating |
| Description: | The Valcom NVIS antenna
is specifically designed for military applications in open ground
areas, remote from the vehicle or attached to a stationary vehicle
by means of a vehicle mount.
The antenna is made up of 8 rigid aluminum sections which stack together to form the mast and feed-line to the elements. The elements of the antenna consist of four wires sloped towards the ground with insulated ends extending out to serve as guy lines for the mast. Due to the lightweight, sectional design, assembly of this antenna is fast and easy; about 10 minutes for two people. When not in use, the antenna can be packed and stored in a compact canvas carry bag. An expansion kit is available for use in areas of poor radiation. The kit provides 7 additional mast sections and additional guy ropes. It comes in a compact canvas carry bag as well. |
| Diagrams: | Drawing and Theoretical Elevation Plane Pattern |
| Photos: | VD-97-00592 |
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Electrical Characteristics |
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| Frequency Range: | 2 MHz to 30 MHz |
| Polarization: | Horizontal and Vertical simultaneously |
| Power Rating: | 400 Watts |
| Azimuth
Coverage [Radiation Pattern]: |
Omnidirectional (n.b., Elevation Radiation Pattern: Near Vertical Incident Skywave) |
| Impedance: | 50 Ohms nominal |
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Mechanical Characteristics |
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| Assembled Height: | Basic
Antenna: 15 Ft (4.6 M) With Expansion Kit: 30 Ft (9.8 M) |
| Weight: | Basic
Antenna: 15 Lbs. (6.8 kg) With Expansion Kit: 30 Lbs. (13.6 kg) |
| Assembled Dimensions: | Basic
Antenna: 61 Ft by 61
Ft (18.6 M by 18.6 M) With Expansion Kit: 88 Ft by 88 Ft (26.9 M by 26.9 M) |
| Disassembled Volume: | Basic
Antenna: 6 by 6 by 26 In
(15.2 by 15.2 by 66 cm) With Expansion Kit: 6 by 12 by 26 In (15.2 by 30.4 by 66 cm) |
| Erection Time: | Basic
Antenna: 10
minutes, 2 people With Expansion Kit: 20 minutes, 2 people |
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Environmental Characteristics |
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| Wind Loading Test: | With or without Expansion Kit: To 59 MPH (95 km/H) without ice |
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