DatasheetCombined VHF/L-Band Blade Antenna
118-137 MHz & 1025-1095 MHz
SKU: 21-50-56-4
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.
