Phase Stable IFF Antenna
1030 and 1090 MHz
The 21-40-42 is a phase stable directional high gain IFF antenna intended for use as part of an IFF interrogator array for airborne applications.
Electrical design is configured as a monopole Yagi array and the position of the driven element, reflector and directors ensure high gain and a high front to back ratio.
Mechanical design comprises a printed circuit radiating element housed within a glass loaded composite shell fitted to an aluminum alloy base plate. All elements are foamed-in place for long term reliability.
1030 ± 10 MHz
1090 ± 10 MHz
|Gain||≥ 5 dB with respect to λ / 4 monopole|
|Impedance (nominal)||50 Ohms|
|Power||1 KW peak|
|Radiation||Azimuth - Directional Elevation - Co-sinusoidal (approx.)|
|Azimuth Beam width||± 50° to 5 dB points|
|Front-to-Back Ratio||≥ 15 dB|
|Phase Match||± 5° with respect to reference antenna at 1030 MHz and 1090 MHz|
|Antenna RF Connector||TNC Female|
|Construction||Fibre glass shell / Aluminium base|
|Height (max)||2 inches (50.8mm)|
|Length||9 inches (229 mm)|
|Weight||0.75 lb (0.34kg) max|
|Base Plate Shape||Oval|
|Fixing Holes||6 x Ø 0.2 inches (5.1mm) holes , counter bored 0.5 inches (12.7mm)|
- Urethane Gloss White
- Other finish options are available.
- Please specify finish required when ordering.