Combined VHF/L-Band Blade Antenna

Datasheet

Calculate Shipping

Freight to be quoted - $0.00
As the size and weight is not normally known we use several freight carriers to ensure you get the best price. Complete your order or quote and we will get back to you with the available freight options.

Combined VHF/L-Band Blade Antenna

The 21-50-56-5 is a combined VHF/L-Band blade antenna suitable for use with VHF ATC and DME/TACAN systems fitted to helicopters and fixed wing aircraft operating up to Mach 0.95. 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 omni-directivity and minimal interaction between VHF and DME/TACAN elevation patterns. This antenna has DC grounded elements for P-Static and indirect lightning strike effects protection.

Suitable for VHF ATC and DME/TACAN
Passive design - requires no external tuning
Isolated VHF and L-Band outputs
Fully sealed internally foamed high strength blade design
Drop on replacement for AT-1108 and AS3191 mounting hole pattern
Environmental design to MIL-STD-810, –55ºC to +71ºC, 55,000 feet
Lightning protected per MIL-B-5087, less than 500v imported

	21-50-56-5
Model #	21-50-56-5
Brand	Cooper Antennas

Frequency	118 - 156 MHz and 960 - 1220 MHz
Gain	118-156 MHz ≥ 0 dBi average 960-1220 MHz ≥ +2 dBi average
VSWR	≤ 2.5:1 118 - 156 MHz ≤ 2:1 960 - 1220 MHz
Impedance (nominal)	50 Ohms
Power	VHF 50 Watts CW L-band 2 kW Peak
Isolation	≥ 50 dB (L-Band to VHF) ≥ 25 dB (VHF to L-Band)
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)