Multi-Band VHF/UHF/L-Band Communications Antenna

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The 21-50-88 is a rugged multifunction VHF/UHF/L-Band antenna designed for airborne applications. A high strength vertical shell houses 30-174, 225-512 and 960-1220 MHz linear elements to be used with separate VHF/UHF line of sight “LOS” communications and LINK16 datalink or IFF radios. Proprietary matching techniques are used to give excellent gain in the VHF low band without need for external tuning. This antenna includes a lightning protection scheme whereby internal metal elements are high voltage insulated such that diverters on the outer radome surface attached to the isolated aluminum top plate cause local ionisation and lead the strike to airframe.

Footprint is compatible with Collins 437S-1H and Chelton 12-437 series antennas.

Fully environmentally sealed
Internal VHF/UHF to L-Band filters
30-512 MHz communication & 960-1220 MHz for JTIDS/LINK16
Excellent gain throughout without need for external tuning
Allows continuous and simultaneous monitoring of 40.5, 121.5, 156.8, 243 and 406 MHz guard frequencies
AN/ARC-210, AN/ARC-231, ARC164 & SINCGARS compatible.
Designed to MIL-STD-810 Environmental Conditions
Lightning Protected

	21-50-88
Model #	21-50-88
Brand	Cooper Antennas

Frequency	30-174 MHz 225-512 MHz 960-1220 MHz
Gain	≥ -15.5 dBi @ 30 MHz ≥ -7 dBi @ 88 MHz ≥ -1 dBi (average) over 118 -174 MHz ≥ +1 dB (average) over 225 - 512 MHz ≥ +1 dB (average) 960 - 1220 MHz
VSWR	VHF/UHF L-Band	≤ 2.5:1 ≤ 2.0:1
Impedance (nominal)	50 Ohms
Power	50 Watts (30 – 88 MHz) 50 Watts (118 - 174 MHz ) 100 Watts (225 - 512 MHz) 200 Watts ave, 2 KW Peak (L-Band)
Polarization	Vertical
Antenna RF Connector	VHF/UHF L-Band	TNC Female N Type