DatasheetCombined Sonobuoy Receive & UHF Command Blade Antenna
136 to 175 MHz + 291.5 MHz ±0.5
SKU: 21-50-04
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The 21-50-04 is a high strength, low drag VHF/UHF blade antenna. It comprises a top loaded symmetrical diamond shape blade with internal foamed-in-place radiating and matching elements.
An N-type V/UHF connector and SMA test connector are fitted to the aluminum base plate and the antenna is DC grounded for P-static protection.
Frequency of operation covers full VHF Sonobuoy receive and UHF transmit (Command). The antenna can handle up to 80 Watts of UHF power
- High Strength Composite Blade
- Low Side Area, Low Drag
- Suitable for helicopters and aircraft operating up to at least 350 knots
- Environmental Performance to MIL-STD-810
- Radiating element foamed-inplace for structural integrity and prevention of moisture ingress.
- Integrated test probe
| 21-50-04 | |
| Model # | 21-50-04 |
| Brand | Cooper Antennas |
| Frequency |
136 MHz to 175 MHz VHF 291 MHz to 292 MHz UHF |
| Gain (typical) | 1 dBi average, 0 dBi min VHF +3 dBi UHF |
| VSWR |
≤2.5:1 VHF ≤2.0:1 UHF |
| Impedance (nominal) | 50 Ohms |
| Power | 80 Watts CW (UHF) |
| Polarization | Vertical (when mounted vertically) |
| Radiation Pattern | Omni directional in azimuth plane, elevation as plot, UHF pattern similar |
| Test Probe | Decoupled nominally –20 dB on main signal |
| Antenna RF Connector | N Female VHF/UHF |
| Test Probe Connector | SMA Female |
| Antenna Shell Type | Glass loaded thermoplastic blade in aluminum alloy base collar with aluminum top loading disc |
| Height | 10 inches (254mm) |
| Weight | 2.5 lbs max (1.13kg) |
| Fixing Holes | 6 holes 0.2 inches dia. nominal - replaces AT256 |
Finish
- Urethane Lusterless Black Standard
- Other finish options are available.
- Please specify finish required when ordering.
Datasheet:
