DatasheetVHF/UHF Whip Antenna
30 to 512 MHz
SKU: 21-50-12
The 21-50-12 antenna is a high performance, conical whip antenna designed for helicopters and covering the frequency band 30-512 MHz.
The 21-50-12 antenna employs a full length vertical element primarily for use at VHF together with a parasitically excited sleeve monopole designed for operation over the UHF band. Decoupling techniques are incorporated to avoid unwanted interaction and preserve performance throughout all operating bands. A frequency dependent matching network is incorporated to ensure acceptable VSWR with minimum loss of gain throughout the frequency band.
- Covers all operating portions of 30-512 MHz JTRS frequency band
- Efficient decoupling circuits maintain radiation pattern throughout frequency band
- Rugged construction for helicopter applications subject to high vibration levels
- No tuning required 55 inches overall height
- Meets MIL-STD-810 environment
- 50 Watts power handling
- Excellent gain maintained by passive impedance matching throughout frequency band
| 21-50-12 | |
| Model # | 21-50-12 |
| Brand | Cooper Antennas |
| Frequency | 30 - 512 MHz |
| Gain |
30 - 88 MHz -12 dBi to -6 dBi 108 - 174 MHz -4 dBi average 225 - 512 MHz +2 dBi average |
| VSWR |
30 - 88MHz ≤ 2.5:1 108 - 174MHz ≤ 2.5:1 225 - 450MHz ≤ 2.25:1 451 - 512MHz ≤ 3.0:1 |
| Impedance (nominal) | 50 Ohms |
| Power | 50 Watts CW |
| Polarization | Vertical |
| Antenna RF Connector | TNC Female |
| Operational Temperature | -40°C to +71°C |
| Overall Height | 2.36 Inches (59.9mm) |
| Weight | 0.363lbs (0.165kg) max |
| Fixing Plate | 5.3 inches (134.6mm) by 1.8 inches (45.7mm) |
| Fixing Holes | 6 x Ø 0.25 inches (6.35mm) equi-spaced on a 5 inches (127.0mm) P.C.D. |
Finish
- Urethane Lusterless Black Standard
- Other finish options are available.
- Please specify finish required when ordering.
