UHF Phase/Amplitude Matched Airborne Blade Antenna
225 to 512 MHz
SKU: 21-30-17PM
The 21-30-17PM are high performance UHF airborne blade antennas suitable for use on fixed and rotary wing aircraft, where a phase / amplitude matched pair is required for Homing / DF.
Construction is from a one piece glass loaded thermoplastic 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.
Internal radiating element is 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.
Please note part number 21-30-17PM denotes a pair of matched antennas as S/N XXXA and S/N XXXB.
- Covers extended UHF and EPLRS Bands
- High Strength Composite Blade with Aluminum Alloy Base Block
- Low Side Area, Low Drag
- Single ‘N’ Type Connector
- Designed to meet Environmental Performance to MIL-STD-810 & MIL-T-5422
- Foamed in place radiating element
| 21-30-17PM | |
| Model # | 21-30-17PM |
| Brand | Cooper Antennas |
| Frequency | 225 MHz to 512 MHz |
| Gain | +3 dBi typical |
| Gain Variation (between pairs) | ±0.5dB |
| Phase Matching (between pairs) |
±1° (225 - 300 MHz) ±2° (301 - 512 MHz) |
| VSWR | ≤ 2.5:1 |
| Impedance (nominal) | 50 Ohms |
| Power | 50 Watts CW |
| Polarization | Vertical (when mounted vertically) |
| Radiation | Omni directional in azimuth plane |
| Antenna RF Connector | N Female |
| Antenna Shell Type | Glass loaded thermoplastic blade in aluminum alloy base collar |
| Height | 9 inches (229mm) |
| Weight | 0.875 lbs (0.4kg) (each blade) |
| Side Loading | ≥ 8 psi ultimate |
| 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
- Other finish options are available.
- Please specify finish required when ordering.
