VHF Airborne Blade Antenna
167.5 to 192.5 MHz
SKU: 21-20-05
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The 21-20-05 is a high performance VHF airborne blade antenna suitable for helicopters and sub-sonic aircraft.
Construction is from a one piece glass loaded thermoplastic blade moulding intimately bonded into a composite 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 elements 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
- Low Side Area, Low Drag
- Single ‘N’ Type Connector Drop-on replacement for AT-256
- Environmental Performance to MIL-STD-810
- Foamed in place radiating element
| 21-20-05 | |
| Model # | 21-20-05 |
| Brand | Cooper Antennas |
| Frequency | 167.5 MHz to 192.5 MHz |
| Gain (typical) | +1 dBi when mounted at center of an 8 foot (2.4m) minimum diameter ground plane. |
| VSWR | ≤ 2.5:1 |
| Impedance (nominal) | 50 Ohms |
| Power | 25 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 a composite base collar |
| Height | 9 inches (229mm) |
| Weight | 0.66 lbs (0.3kg) |
| Side Loading | ≥ 6 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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