Bae Systems, Inc.

Robert John Mark Longstone

Mohammed Nawaz

Andrew James Smith

Michael Andrew Scott

Simon Charles Giles

David John Aitken

Ian Morrison Graham

An optical signal transmission apparatus () for a rotating antenna comprising a plurality of optical modulators () arranged for receiving a respective plurality of analog RF signals () and for modulating a respective plurality of optical signals therewith to produce a plurality of modulated analog optical signals (). A plurality of opto-electrical converters () each converts a respective modulated analog optical signal () into an analog electrical signal. The plurality of optical modulators () are rotationally coupled in optical communication with the plurality of opto-electrical converters () via an optical rotary joint () including a reversion prism.

Relating to antennas

A frequency synthesizer and oscillator are disclosed for reducing noise in processed signals. The synthesizer and oscillator comprise an array of frequency dividers adapted to receive an input signal, which is derived from a single signal source having a prescribed frequency. The synthesizer and oscillator further comprise at least one frequency multiplier coupled to at least one of the frequency dividers, such that in use, the dividers and the at least one multiplier are operable to generate a plurality of frequencies which are coherent with the prescribed frequency. A regulated power supply is also disclosed comprising a filter and first and second regulators, for reducing noise in the output voltage of the power supply.

Frequency synthesis and noise reduction

Growing community of inventors

Isle of Wight, United Kingdom

Robert John Mark Longstone