DatasheetAirborn Stub Antenna
30 to 512 MHz
SKU: 21-50-30
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Covering the full VHF/UHF JTRS frequency band, the 21-50-30 is a lightweight broadband stub antenna intended for helicopter and moderate speed aircraft.
Construction uses an advanced fiberglass covered radiating element bonded into a machined aluminum base.
Unique double trap design ensures good elevation pattern throughout the frequency band and passive matching housed within the base maintains VSWR within 2.5:1 and provides exceptional gain for such a small overall structure.
- Covers full JTRS VHF/UHF Comms band
- Robust Fiberglass construction
- Lightweight
- Meets AS-3191 lightning strike requirements
- Designed to meet MIL-STD-810 Environmental Specification
- Low profile, 21 inch height
- Omni-directional azimuthal radiation pattern
- 50 Watts power handling
- Gain from –24 to 0 dBi
| 21-50-30 | |
| Model # | 21-50-30 |
| Brand | Cooper Antennas |
| Frequency | 30-512 MHz |
| Gain |
30 MHz -24 dBi 70 MHz -15 dBi 88 MHz -12 dBi 108-174 MHz -3 dBi average 225-512 MHz 0 dBi average |
| VSWR |
30-174 MHz ≤ 2.5:1 225-512 MHz ≤ 2.5:1 |
| Impedance (nominal) | 50 Ohms |
| Power | 50 Watts |
| Polarization | Vertical |
| Radiation Pattern | Omni directional in azimuth plane |
| Antenna RF Connector | TNC Female |
| Antenna Shell Type | Fiberglass element in aluminium base collar |
| Height | 21 inches (533mm) |
| Weight | 0.9 lbs (0.4kg) |
| Base Plate Shape | Circular |
| Fixing Holes | 4 x Ø 0.196 inch (5mm) holes, counter sunk 100° |
Finish
- Urethane Lusterless Black Standard
- Other finish options are available.
- Please specify finish required when ordering.
Datasheet:
