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Part Number -- AS-4366A/U |
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| Name: | Antenna System |
| Category: | Very High Frequency Antennas |
| Diagrams: | Dimensions and Mounting Details |
| Photos: | AS-4366A/U |
| NATO Stock Number (NSN): | 5985-21-920-0045 |
| Height: | 110 In (2.79 M) (repeated below) |
| Frequency Range: | 30 MHz to 88 MHz |
| Features: | * Broadband * Extremely rugged and reliable * Base mount for placement flexibility * High voltage isolation for safety * Easy assembly/disassembly |
| Description: | The AS-4366A/U is a
general purpose VHF broadband communications antenna system.
Ideal for shipboard applications, this antenna system is a base
mounted version of the AS-3900A/VRC,
featuring rugged construction and rigid mounting of the whip
section.
The AS-4366A/U antenna system provides omni-directional, vertically polarized coverage over the 30 to 88 MHz frequency range. It is conservatively rated for 150 Watts of RF input power and exhibits a VSWR of less than 3.5:1 over the entire operating band with reference to a 50 Ohm line impedance. The Input RF connection is made through a single coaxial N-Type connector located centrally on the bottom of the mounting base. The mounting base houses the matching unit and electro-magnetic pulse (EMP) protection. A two-piece, permanently joined fibreglass whip element and a polycarbonate mounting base with a rigid antenna support make up the antenna system's simple two-piece construction. It is approximately 110 inches in height, has an antenna element diameter of less than 1 inch and weighs about 11 pounds. The antenna system has been designed to meet the vibration and service requirements of MIL-S-901, Type A and MIL-STD-810. Mounting is provided by four 0.453 inch diameter holes (for 3/8 hardware) on a 4.5 inch diameter bolt circle located on the mounting flange at the base of the antenna system. |
| Technical Manual: | 
AS-4366A/U Manual |
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Electrical Characteristics |
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| Frequency Range: | 30 MHz to 88 MHz |
| Polarization: | Vertical |
| Power Handling: | 150 Watts average |
| Azimuth
Coverage [Radiation Pattern]: |
Omnidirectional ± 1 dB |
| Impedance: | 50 Ohms nominal |
| VSWR: | 3.5:1 maximum 2.5:1 average |
| Gain: | -7.6 to -1.1 dB relative to resonant quarter wave monopoles over 30 to 88 MHz |
| High Voltage Protection: | 12 kV on contact with high power line or high voltage source |
| Input Connection/or: | N Type Connector |
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Mechanical Characteristics |
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| Height: | 110 In (2.79 M) |
| Weight: | 11 Lbs. (5 kg) |
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Environmental Characteristics |
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| Temperature: | -60°F to 160°F (-51°C to 71°C) |
| Humidity: | Relative humidity 95% |
| Altitude: | -990 Ft to 16500 Ft (-300 M to 5000 M) above Sea Level |
| Wind Loading Test: | 50 MPH (80 km/H) operating |
| Ice Loading Test: | 1/2 in (13 mm) radial |
| Vibration: | 5-500 Hz; MIL-STD-810 |
| Shock: | MIL-S-901-1 Grade A |
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