IMPROVEMENTS IN AND RELATING TO ANTENNAS
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United States of America Patent
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Issued Date -
Dec 3, 2015
app pub date -
Dec 5, 2013
filing date -
Dec 14, 2012
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Abstract
An optical signal transmission apparatus (1) for a rotating antenna comprising a plurality of optical modulators (6) arranged for receiving a respective plurality of analogue RF signals (5) and for modulating a respective plurality of optical signals therewith to produce a plurality of modulated analogue optical signals (8). A plurality of opto-electrical converters (14) each converts a respective modulated analogue optical signal (13) into an analogue electrical signal. The plurality of optical modulators (6) are rotationally coupled in optical communication with the plurality of opto-electrical converters (14) via an optical rotary joint (10) including a reversion prism.
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