Phase Stable IFF Antenna

1030 and 1090 MHz

SKU: 21-40-42

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Phase Stable IFF Antenna

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. 

21-40-42
Model # 21-40-42
Brand Cooper Antennas
Frequency

1030 ± 10 MHz

1090 ± 10 MHz

Gain ≥ 5 dB with respect to λ / 4 monopole
VSWR ≤ 1.5:1 
Impedance (nominal) 50 Ohms
Power 1 KW peak 
Polarization Predominantly Vertical 
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)

Finish

  • Urethane Gloss White
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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