UHF Airborne Blade Antenna
225 to 407 MHz
SKU: 21-30-18
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The 21-30-18 is a high performance UHF airborne blade antenna suitable for use on fixed and rotary wing aircraft.
Construction is from a one piece fiberglass blade 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.
The metal base block also enables the 21-30-18 to meet the lightning protection requirements of AS-3191/A.
Internal radiating element are 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.
- High Strength Composite Blade with Aluminum Alloy Base Block
- Low Side Area, Low Drag
- Single ‘N’ Type Connector
- Drop-on replacement for AS-3984/ARC , NSN 5985-01-285-9817
- Meets Lightning Strike Criteria of AS-3191
- Environmental Performance to MIL-STD-810
- Foamed in place radiating element
| 21-30-18 | |
| Model # | 21-30-18 |
| Brand | Cooper Antennas |
| Frequency | 225 MHz to 407 MHz |
| Gain | +3 dBi when mounted at center of an 8 foot (2.4m) minimum diameter ground plane. |
| VSWR | ≤ 2.5:1 |
| Impedance (nominal) | 50 Ohms |
| Power | 100 Watts CW |
| Polarization | Vertical (when mounted vertically) |
| Radiation | Omni directional in azimuth plane |
| Antenna RF Connector | N Female |
| Antenna Shell Type | Epoxy/fiberglass blade in aluminum alloy base collar |
| Height | 9.10 inches (231mm) |
| Weight | 0.9 lbs (0.4kg) |
| 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.
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