Diamond Upgrades ASR-8 Air Traffic Control Rotary Joint to Mode-S and Roll-Rings®

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Diamond Antenna & Microwave Corporation and Diamond-Roltran LLC announce the successful upgrade of an old ASR-8 Air Traffic Control rotary joint that adds Mode-S functionality and maintenance-free Roll-Rings®.

ASR-8 Microwave Rotary Joint with Mode S capability and maintenance free Roll-Rings

ASR-8 Upgraded with Mode S Capability and Roll-Rings

Mode-S IFF functionality is enabled with the addition of one L-Band channel as part of the refurbishment. The rotary joint now has six RF channels. Operating intervals are extended with the complete replacement of the old-style slip ring with a modern maintenance-free Roll-Ring®. The twelve channel Roll-Ring® assembly fits inside the existing slip-ring housing.

The ASR-8 rotary joint is now ready for continuous use in a military ASR-8 radar system to detect aircraft positions in the surrounding airspace. The refurbishment includes new bearings, seals, waveguide shaft, L-Band module, S-Band modules, cables, connectors and the maintenance-free Roll-Ring®. The ASR-8 rotary joint, with its fresh coat of paint, looks and performs like a new rotary joint.


Diamond Antenna and Microwave Corporation is a leader in the design and manufacture of microwave rotary joints for radar and satellite communication applications. Technology enhancements from Diamond include the patented compressive choke module with unsurpassed channel isolation and Mode S compliance in air traffic control applications. Diamond Antenna & Microwave also has the capability and experience to modify or repair any make or model of microwave rotary joint. http://www.diamondantenna.com

Diamond-Roltran, LLC provides the proven maintenance-free Roll-Ring® rolling electrical contact solution to replace slip rings for rotary power, signal and data transfer requirements for mission critical applications the world over. Diamond-Roltran supplies Roll-Rings® for military, government and aerospace customers worldwide and supplies Roll-Rings® integrated into rotary couplers for microwave antenna applications through Diamond Antenna & Microwave and Diamond Antenna Europe BVBA. Diamond-Roltran is the authorized rotary joint repair facility for Diamond Antenna & Microwave. http://www.diamondroll-ring.com

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John MacMillan
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