Rotary joint saves space in antennas for Ka-band satellite-on-the-move

10th July 2015
Posted By : Jordan Mulcare
Rotary joint saves space in antennas for Ka-band satellite-on-the-move

A miniature dual-channel rotary joint, which has been specifically designed to save space in antennas for Ka-band satellite-on-the-move communications systems, is being deployed by Link Microtek for high-data-rate applications in both the military and commercial sectors.

With its high-power transmit channel implemented in a right-angle WR28 waveguide on the fixed (input) side, and a female K-type coaxial connector on the rotating (output) side, the AM28CORJD rotary joint measures just 31.75x74.68mm. This excludes the 50mm-diameter UBR320 standard bulkhead flange.

The central transmit channel covers Ka-band frequencies from 29 to 31GHz and delivers excellent microwave performance, with a maximum power rating of 40WCW, a typical insertion loss of only 0.6dB and a maximum VSWR of 1.25:1.

The L-band receive channel uses two female SMA coaxial connectors and operates over the frequency range DC to 2.15GHz. It offers a microwave power rating of 1WCW, a maximum DC current rating of 0.5A, an insertion loss of 0.25dB and a typical VSWR of 1.5:1.

Designed and manufactured at Link Microtek’s premises in Basingstoke, this robustly constructed rotary joint is fabricated from lightweight aluminium with an Iridite finish. The component's performance under extreme environmental conditions either meets or exceeds the requirements of MIL-STD-810G.

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