04-04-2022 | Link Microtek Ltd | Subs & Systems
The latest addition to Link Microtek’s expansive range of microwave rotary joints is a device providing three X-band channels, one of which is utilised for transmitting and the others for receiving signals in radar systems for coastal/border surveillance or critical infrastructure protection. The new AMCORJD-3 device allows microwave signals to be fed to or from a compact radar antenna rotating continuously at more than 60rpm and typically exposed to harsh environmental conditions, including wind, rain and salt spray. The design brief was especially tough as it had to fit in the same space as the prior two-channel version.
The channels cover the frequency range 8.5GHz to 9.5GHz and can handle average microwave powers over 50W and peak powers of over 200W. Microwave performance is outstanding, with a maximum insertion loss of just 1.2dB, maximum VSWR of 1.5:1 and isolation of 80dB.
To satisfy long life and continuous operation requirements, this robustly constructed rotary joint uses a non-contacting design, so the only wearing parts are the bearings. It is produced from lightweight aluminium with a Surtec finish and includes IP65 sealing to protect it from moisture and dust ingress. Providing N-type connectors on the rotating side and SMA-type connectors on the fixed side, the rotary joint has overall dimensions of 84mm (D) x 150mm (L), excluding the connectors and bulkhead mounting flange. Other rotary-joint configurations and sizes can be supplied on request, customised to suit specific radar antenna needs.
