DatasheetMulti-function UHF LOS/Satcom & GPS Antenna
225 to 450 MHz and 1564 to 1587 / 1216 to 1239 MHz
SKU: 21-50-79
The 21-50-79 is a rugged multifunction UHF, LOS, UHF Satcom and GPS antenna designed for airborne applications. A high strength aerodynamic vertical shell houses a 225 - 450 MHz linear element that can be used for UHF line of sight “LOS” communications or UHF Satcom at low angles of elevation. This vertical shell also supports a circular horizontal disc containing a pair of cross dipoles connected to provide high angle, right hand circularly polarized UHF Satcom coverage and an L1/L2 passive GPS antenna.
- Hi and Lo angle UHF Satcom coverage
- Covers L1 and L2 GPS Frequencies
- EPLRS compatible
- Low height, just 9"
- Fixing holes compatible with 437S1-H
- Designed to MIL-STD-810 Environmental Requirements
| 21-50-79 | |
| Model # | 21-50-79 |
| Brand | Cooper Antennas |
| Frequency |
UHF Hi Angle UHF Lo Angle GPS |
240 - 400 MHz 225 - 450 MHz 1564 - 1587 / 1216 - 1239 MHz |
| Gain (Typical) |
Hi Angle Lo Angle GPS |
+5 dBiC at Zenith +2.0 dBi average @ 225 - 450 MHz +4 dBiC @ Zenith |
| VSWR |
Hi Angle Lo Angle |
≤ 2.0:1 ≤ 2.5:1 |
| Impedance (nominal) | 50 Ohms for both ports | |
| UHF Power | 200 Watts CW | |
| Polarization |
UHF Hi Angle UHF Lo Angle GPS |
Right Hand Circular Vertical Right Hand Circular |
| Isolation |
Between Low and High Angle : ≥ 15 dB (mid band) Between Low Angle and GPS : ≥ 30 dB Between High Angle and GPS : ≥ 30 dB |
|
| Antenna RF Connector |
UHF Hi Angle UHF Lo Angle GPS |
N Female TNC Female TNC Male |
| Height | 9 inches (228mm) max |
| Disc diameter | 15.9 inches (404mm) max |
| Weight | 9 lbs (4.09Kg) max |
| Mounting Hole Configuration | 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 - Gloss White
- Baseplate - Unpainted, Alocrom
- Other finish options are available.
- Please specify finish required when ordering.
