COTS and custom designed Dual Linear and Dual Circular Polarised, sinuous antennas for direction finding, ELINT, RWR and ESM airborne, sea and ground-based applications.

The Steatite family of sinuous antennas simultaneously handle signals of any two orthogonal linear polarisations and simultaneous left and right-handed circular polarisations dependent on antenna design.

This provides intercept opportunities for a wide range of arbitrarily polarised signals, from devices also giving a wide bandwidth and broad beamwidth.

The sinuous antennas can also be used as feeds for reflector antennas where they give the advantage of a stable phase center across the frequency band.

As with other Steatite products, bespoke designs or modifications may be accommodated.

     Catalogue Number

c.w. (W)



0.2 to 2QSI-DL-0.2-2-S-SGDual Linear

10<3.0:1-4.2 to 3.691.6 to 69°>35
0.4 to 2QSI-DL-0.4-2-N-SG-RDual Linear

 2<3.6:11.3 to 6.462 to 48°>34
0.5 to 3QSI-DL-0.5-3-S-SG-RDual Linear

 2<2:1-0.2 to 5.856 to 96°>40
0.7 to 4QSI-DL-0.7-4-S-SGDual Linear

10<2.6:10 to 4.155 to 94°>34
2 to 18QSI-DL-2-18-S-SGDual Linear

1<3.2:1-3.8 to 4.464 to 109°>32
2 to 24QSI-DL-2-24-S-SGDual Linear

2<3:1-8 to 3145 to 60°>30
0.7 to 4QSI-DC-0.7-4-S-SGDual Circular

2<1.4:1-1 to 2.2dBiC102 to 56° –
2 to 18QSI-DC-2-18-S-SG-LDual Circular

2<2:1– 5.2 to 2.6dBiC42.6 to 95°