Miniature dual-channel rotary joint saves space in Ka-band satellite systems
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 31.75 mm (D) x 74.68 mm (H), excluding the 50 mm-diameter UBR320 standard bulkhead flange.
The central transmit channel covers Ka-band frequencies from 29 to 31 GHz and delivers excellent microwave performance, with a maximum power rating of 40-W CW, a typical insertion loss of only 0.6 dB 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 2.15-GHz. It offers a microwave power rating of 1-W CW, a maximum DC current rating of 0.5 A, an insertion loss of 0.25 dB 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, and its performance under extreme environmental conditions either meets or exceeds the requirements of MIL-STD-810G.
Other rotary-joint configurations and sizes can be supplied on request, customised to suit specific antenna requirements.
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