Broadband Airborne Blade Antenna

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Broadband Airborne Blade Antenna

The 21-50-56-1 is a vertically polarized, omni-directional antenna, compatible with airborne radios operating within the 30 to 512 MHz frequency range plus Link16, Tacan, IFF, JTIDS and other L-band systems.

This antenna is constructed as a one-piece, high strength radomes built using high temperature resin and woven fibre glass and has an operating side load acceptance of 8 p.s.i. As such, it is suitable for use on subsonic and supersonic aircraft operating in excess of Mach 2.5.

The element is DC grounded for high voltage transfer protection.

Suitable for Mach 2.5+
Passive design-requires no external tuning
Fully Foamed to Provide High Environmental Integrity
Aluminum Alloy Retaining Collar Accepts High Side Loading
Drop-on Replacement for AT-1108 & AS3191
Suitable for AN/ARC-210, AN/ARC-231 and Similar Multi-Mode Radios
Designed to MIL-STD-810

	21-50-56-1
Model #	21-50-56-1
Brand	Cooper Antennas

Frequency	30 - 88 MHz, 108 - 174 MHz, 225 - 512 MHz 960 - 2500 MHz
Gain	30 MHz ≥ -23.0 dBi 60 MHz ≥ -18.0 dBi 88 MHz ≥ -10.0 dBi 118 MHz ≥ -7.0 dBi 156 MHz ≥ -2.0 dBi 174 MHz ≥ -1.0 dBi 225-512 MHz ≥ 0 dBi average 960-2500MHz +2dBi average
VSWR	≤ 2.5:1 30 - 88 MHz ≤ 3.0:1 108 - 117 MHz ≤ 2.5:1 118 - 174 MHz & 225 - 400 MHz ≤ 2.75:1 401 - 512 MHz ≤ 2.0:1 960 - 2500 MHz
Impedance (nominal)	50 Ohms
Power	V/UHF - 50 Watts CW, L-band - 100 Watts
Polarization	Essentially vertical (when mounted vertically)
Antenna RF Connector	V/UHF - TNC Female L-Band - N Female

Antenna Shell Type	High density foam filled epoxy/fiber glass shell set in aluminum alloy base collar
Height	14.75 inches (375mm)
Weight	4.5 lbs (2.05kg)
Side Loading	≥8 psi operating limit load over - 70 to + 135ºC (+ 155°C short term)
Base Plate Shape	Tear drop
Fixing Holes	6 x Ø 0.200 inches (5mm) holes, counter bore Ø 0.39 inches (9.9mm)