VHF Airborne Blade Antenna
167.5 to 192.5 MHz
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
|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.|
|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)|
- Urethane Lusterless Black
- Other finish options are available.
- Please specify finish required when ordering.