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Cobham Intros Ultra Wideband, Dual Polar, Sinuous Spiral Antenna

7 August 2013

CHEVELEY, United Kingdom - This newly developed sinuous, spiral antenna is particularly suitable for security, surveillance and EW applications. Its rugged, machined housing makes it ideal for harsh environments. 
Cobham Newmarket Sinuous Spiral Antenna reference SSA0218RL/2044 - RF CafeAll development engineering and manufacture has been carried out in the UK which means that the product is not subject to ITAR.
Ultra wideband, frequency covers 2 to 18 GHz. 
Directional, the Beamwidth is 65° to 95° in azimuth and elevation, with a maximum Beam Squint of only +/-4 degrees to -3 dB points across the band.  
Dual circular (Right and Left Hand) polarisation over the entire band means that there is no likelihood of any frequency being missed at any polarisation.
The very good, consistent, monotonic radiation patterns enable Direction Find (DF) systems to provide accurate Angle of Arrival data when using amplitude comparison techniques. Amplitude-matched sets of antennas can be provided.
Phase-matched sets of antennas can be provided, with support radiation pattern data, to allow high resolution DF.
Dimensions 84 mm (3.3”) by 67 mm (2.6”) diameter, weight 250 grams (8.8 ounces).
Model reference SSA0218RL/2044, Sinuous Spiral Antenna with Dual Circular Polarisation.

 polar plot of the antenna's radiation pattern is measured at 11 GHz - RF Cafe
This polar plot of the antenna's radiation pattern is measured at 11 GHz. It shows the azimuth plot of the Left Hand Circular polarisation and is an example of the excellent monotonic pattern.
antenna's radiation pattern demonstrates the peak gain performance over the 2 to 18 GHz frequency band - RF Cafe
This graph derived from the antenna's radiation pattern demonstrates the peak gain performance over the 2 to 18 GHz frequency band.

Az-El radiation patterns - RF Cafe Azimuth-Elevation radiation patterns - RF Cafe

The azimuth and elevation radiation patterns shown above in X-Y format at 7 GHz demonstrate good stability in all cuts.
Full radiation pattern data is available.


About Cobham
Cobham specializes in meeting the demand for data, connectivity and bandwidth in defense, security and commercial environments. Offering a technically diverse and innovative range of technologies and services, the Group protects lives and livelihoods, responding to customer needs with agility that differentiates it. The most important thing we build is trust. Employing more than 10,000 people on five continents, the Group has customers and partners in over 100 countries.

Contact for Technical Queries:
Head of Business Development, Cobham Antenna Systems, Microwave Antennas, Newmarket, UK
Malcolm Ware
+44 1638 732172

Posted  August 7, 2013
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