View PDF brochure for Combined VHF/L-Band Blade AntennaDatasheet

Combined VHF/L-Band Blade Antenna

118-137 MHz & 1025-1095 MHz

SKU: 21-50-56-4

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Combined VHF/L-Band Blade Antenna

The 21-50-56-4 is a combined VHF/L-Band blade antenna suitable for use with VHF ATC and IFF systems fitted to helicopters and fixed wing aircraft operating up to Mach 0.9. Construction comprises a high strength, glass epoxy radome set into an aluminum alloy base collar with internal ‘foamed-in-place’ radiating, matching and filtering elements. RF design insures good azimuthal omnidirectivity and minimal interaction between VHF and IFF-SSR elevation patterns.

This antenna has DC grounded elements for P-Static and indirect lightning strike effects protection. 

21-50-56-4
Model # 21-50-56-4
Brand Cooper Antennas
Frequency

118 - 137 MHz and

1025 - 1095 MHz

Gain

118-137 MHz ≥ 0 dBi average

1025-1095 MHz ≥ +3 dBi average

VSWR

≤ 2.25:1 118 - 137 MHz

≤ 1.5:1 1025 - 1095 MHz 

Impedance (nominal) 50 Ohms
Power

VHF 50 Watts CW

L-band 1 kW Peak 

Polarization Essentially vertical (when mounted vertically) 
Radiation Pattern Nominally omni-directional in azimuth and Co-sinusoidal in elevation
Antenna RF Connector

VHF - 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 3.75 lbs (1.7kg)
Side Loading  ≥ 8 psi ultimate 
Base Plate Shape Tear drop 
Fixing Holes 6 x Ø 0.200 inches (5mm) holes, counter bore Ø 0.39 inches (9.9mm)

Finish

  • FED-STD 595 17925 Gloss White
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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