DatasheetELT Airborne Blade Antenna
121.5, 243 and 406 MHz
SKU: 21-50-40
The 21-50-40 is a high performance V/UHF airborne three frequency ELT blade antenna suitable for aircraft installation.
Construction is from a one piece glass loaded thermoplastic blade molding intimately bonded into an aluminum alloy base block which houses the matching circuits and provides for very solid attachment to the airframe via 6 fixing holes drilled to the same pattern as the AT-256 UHF antenna.
The metal base block also enables the 21-50-40 to meet the lightning protection requirements of AS-3191/A.
Internal radiating element are shaped in such a way as to produce minimum VSWR and also to optimize radiation. The antenna assembly is sealed by closed cell foam and finished in lusterless black or grey urethane paint.
- Covers 121.5, 243 and 406 MHz without tuning
- High Strength Composite Blade with Aluminum Alloy Base Block
- Low Side Area, Low Drag Single TNC Type Connector
- Meets Lightning Strike Criteria of AS-3191
- Environmental Performance to MIL-STD-810
| 21-50-40 | |
| Model # | 21-50-40 |
| Brand | Cooper Antennas |
| Frequency | 121.5, 243 and 406 MHz |
| Gain |
+ 2dBi (UHF) - 2dBi (VHF) |
| VSWR |
2.0:1 max @ 121.5 and 243 MHz 1.5:1 max @ 406 MHz |
| Impedance (nominal) | 50 Ohms |
| Power | 25 Watts CW |
| Polarization | Essentially Vertical (when mounted vertically) |
| Radiation Pattern | Nominally omni directional in azimuth plane |
| Antenna RF Connector | TNC Female |
| Antenna Shell Type | Thermoplastic/glass blade in aluminum alloy base collar |
| Height | 9 inches (229mm) |
| Weight | 2 lbs approx. (0.9kg) |
| Base Plate Shape | Diamond shape |
| Fixing Holes | 6 x Ø 0.203 inch (5.2mm) holes, counter bored Ø 0.43 inches (10.9mm) |
Finish
- Urethane Lusterless Black Standard
- Other finish options are available.
- Please specify finish required when ordering.
