DatasheetMulti-function VHF/UHF LOS/Satcom & L-Band Antenna
30 to 600 MHz, 240 to 400 MHz & 960 to 1220 MHz
SKU: 21-50-74
The 21-50-74 is a rugged, multifunction VHF/UHF LOS, UHF Satcom and L-Band antenna designed for airborne applications. A high strength aerodynamic vertical shell houses a 30 to 600 MHz linear element that can be used for VHF/ UHF line of sight “LOS” communications or UHF Satcom at low angles of elevation as well as TACAN/IFF/LINK16 (L-band). This vertical shell also supports a “Bat-Wing” shape horizontal element containing a pair of cross dipoles, connected to provide high angle, right hand circularly polarized UHF Satcom coverage.
The antenna is completely sealed and filled with closed cell foam for long term environmental protection and reliability. Internal filtering allows the antenna to operate simultaneously with Satcom or LOS and L-band
- Hi angle UHF Satcom & MUOS coverage
- Lo Angle VHF/UHF LOS communications
- Isolated Outputs
- EPLRS compatible
- Suitable for TACAN/IFF/LINK 16
- Low wingspan minimizes loading on aircraft structure
- Fixing holes compatible with 437S1-H
- Designed to MIL-STD-810 Environmental Requirements
- Erosion protection over all leading edge surfaces
| 21-50-74 | |
| Model # | 21-50-74 |
| Brand | Cooper Antennas |
| Frequency |
UHF Hi Angle : 240 - 400 MHz VHF/UHF Lo Angle : 30 - 600 MHz L-Band : 960 to 1220 MHz |
|
| Gain (typical) |
Hi Angle Lo Angle
|
+6.5 dBiC 30-88 MHz -18.5 dBi to - 8 dBi 108-174 MHz -1 dBi average 225-600 MHz +1 dBi average 960-1220 MHz +1 dBi average |
| VSWR |
Hi Angle Lo Angle VHF/UHF L-Band |
≤ 2.0:1 ≤ 2.5:1 ≤ 2.0:1 |
| Impedance (nominal) | 50 Ohms for all ports | |
| Power |
Hi Angle Lo Angle VHF/UHF L-Band |
50 Watts CW 200 Watts CW (LOS and Satcom) 2 KW Peak, 200 Watts CW |
| Isolation |
VHF/UHF to L-band : 40 dB min L-band to Satcom : 30 dB min Note : depending upon system architecture, it may be necessary to provide increased isolation for simultaneous operation which can be adhered by 2 x 21-80-04-1 Low pass and 1 x 21-80-03-1 High pass external, in-line filters - see separate datasheets |
|
| Polarization |
UHF Hi Angle VHF/UHF Lo Angle and L-Band |
Right Hand Circular Vertical |
| Antenna RF Connector |
UHF Hi Angle UHF Lo Angle L-Band |
N Female TNC Female N Female |
| Height | 12 inches (305mm) |
| Wingspan | 13 inches (330mm) max |
| Weight | 9.7lbs (4.4Kg) |
| Fixing Holes | 8 holes each 0.208 - 0.234 dia. Inches (5.28 - 5.94mm) |
| ENVIRONMENTAL | |
| Designed to EnvironmentaL |
MIL-E-5400 Class 2 MIL-STD-810 |
Finish
- Antenna - Urethane Lusterless Black Standard
- Baseplate - Unpainted, Alocrom
- Other finish options are available.
- Please specify finish required when ordering.
