Multi-function UHF LOS/Satcom L-Band and GPS Antenna

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Multi-function UHF LOS/Satcom L-Band and GPS Antenna

The 21-50-73 is a rugged multifunction UHF LOS, UHF Satcom, L-Band and GPS antenna designed for airborne applications. A high strength aerodynamic vertical shell houses a 225 to 450 MHz linear element that can be used for UHF line of sight “LOS” communications or UHF Satcom at low angles of elevation. This vertical shell also supports a “Bat-Wing” shape horizontal element containing a pair of cross dipoles, connected to provide high angle, right hand circularly polarized UHF Satcom coverage and an L1/L2 active GPS antenna.

A high power grounded L-Band element is integrated into the antenna base. The antenna is completely sealed and filled with closed cell foam for long term environmental protection and reliability.

Hi angle UHF Satcom & MUOS coverage
Lo Angle UHF LOS communications
Covers L1 and L2 GPS Frequencies
EPLRS compatible
Suitable for TACAN/IFF/LINK 16
Low wingspan minimizes loading on aircraft structure
Fixing holes compatible with 437S1-H
Designed to MIL-STD-810 Environmental Requirements
Erosion protection over all leading edge surfaces

	21-50-73
Model #	21-50-73
Brand	Cooper Antennas

Frequency	UHF Hi Angle : 240 - 400 MHz UHF Lo Angle : 225 - 450 MHz L-Band : 960 to 1220 MHz GPS: 1564 - 1587 / 1216 - 1239 MHz
Gain (typical)	Hi Angle : +6.5 dBiC Lo Angle : +2.0 dBi average @ 225 - 450 MHz GPS: +3.0 dBiC @ Zenith + 30 dB amplifier
VSWR	Hi Angle : ≤ 2.0:1 Lo Angle : ≤ 2.5:1 225-400 MHz L-Band : ≤ 2.0:1 GPS : ≤ 2.0:1
Impedance (nominal)	50 Ohms for all ports
Power	UHF : 200 Watts CW L-Band : 2 KW Peak, 200 Watts CW GPS: 1 Watt
Polarization	UHF Hi Angle : Right Hand Circular UHF Lo Angle and L-Band : Vertical GPS : Right Hand Circular
Antenna RF Connector	UHF Hi Angle : N Female UHF Lo Angle : TNC Female L-Band : N Female GPS: TNC Female

Height	12 inches (305mm) max
Wingspan	13 inches (330mm) max
Weight	9.7lbs (4.4Kg)
Mounting Hole Configuration	8 holes each 0.208 - 0.234 dia. Inches (5.28 - 5.94mm)