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AS-4163/URC: Quick Reference Data

Part Number -- AS-4163/URC

Name: Dual Channel UHF Dipole Antenna
Category: VHF Antennas
Diagram(s): Dimensions and Mounting Details
Photo(s): AS-4163
NATO Stock Number (NSN): 5985-01-338-9509
Height: 96 in (243.8 cm)  (repeated below)
Frequency Range: 225 MHz to 400 MHz - for antennas (repeated below)
Features: * broadband
* lightweight
* shipboard applications
* receiving or transmitting mode
* weatherproof
Description:  The AS-4163/URC dual channel, UHF antenna is a rugged, self-supporting, vertically polarized, broadband antenna covering the frequency range of 225 MHz to 400 MHz.  This light weight antenna can be used in either the transmit mode or the receive mode.

The antenna is designed for use under the severe environmental conditions encountered in a shipboard environment.

The two independent radiating elements are housed in a single fibreglass radome with an integral fibreglass mounting base.  A feed-through cable running from the base to the top aluminum flange allows for the mounting of another antenna, such as the AS-390/SRC, atop the AS-4163/URC.

The two antenna channels are high power, balanced dipoles, each dipole is capable of handling power levels of up to 1 KW average.  The isolation between the two channels is greater than 25 dB.  Each channel exhibits a nominal input impedance of 50 ohms and a VSWR of 3.0:1 maximum and 2.5:1 average over the entire frequency range of 225 MHz to 400 MHz.

The antenna has been designed to meet the vibration requirements of MIL-STD-167, TYPE I and II, the shock requirements of MIL-S-901 and the environmental requirements of MIL-E-16400H.
Notes: 1.  do not use lead base pain to touch-up or repaint antenna
Technical Manual:    AS-4163 Manual

Electrical Characteristics

Frequency Range: 225 MHz to 400 MHz
Polarization: Vertical
Power Rating: 1000 W average (each channel)
Azimuth Coverage
[Radiation Pattern]
:
Omni-directional
Impedance: 50 Ohms nominal
VSWR: 2.5:1 average, 3.0:1 maximum
Gain: 2 dBic (average)
Input Connection: Three N-Type Receptacles

Mechanical Characteristics

Height/Length: 96 in (243.8 cm)
Weight: 40 Lbs. (18.2 kg)
Centre of Gravity: 33 in (83.8 cm) up from base
Operating Temperature: -55 C to +65 C
Radiating Element: aluminum
Radome and Base Flange: epoxy fibreglass
Top Mounting Flange: aluminum
Finish: Haze gray silicone alkyd enamel

Environmental Characteristics

Humidity: MIL-STD-810E, Procedure III
Vibration: MIL-STD-167-1 Type 1
Shock: MIL-S-901-1 Grade A 
 

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