公开(公告)号：US10191219B2

公开(公告)日：2019-01-29

申请号：US15561175

申请日：2016-03-29

Applicant: BAE SYSTEMS plc

Inventor： Christopher Ralph Pescod ,  Mohammed Nawaz ,  Colin James Harper

IPC: G02B6/36 ,  G02B6/35 ,  H01Q3/26 ,  H01Q3/24

Abstract: An optical selector arrangement (22), comprising: a first set of optical ports (30), having a first number of optical ports, the first number being greater than or equal to 2; a second set of optical ports (42), having a second number of optical ports, the second number being greater than the first number; the second set of optical ports being for communicating with the first set of optical ports, a selector interface (40) for the optical selector arrangement, the selector interface comprising the second set of optical ports (42), a part of the optical selector arrangement functioning as a selector (44), the selector being arranged to selectively optically couple the first set of optical ports (30) to a set of ports of the second set of optical ports (42) of the selector interface, the selector (44) being rotatable relative to the selector interface (40) to facilitate the selection by optically aligning the first set of optical ports (30) to the second set of optical ports (42) of the selector interface (40); the selector (44) being configured to be continuously relatively rotatable over multiple rotations, to selectively optically couple the first set of optical ports (30) to a different set of ports of the second set of optical ports of the selector interface.

公开(公告)号：US20170257165A1

公开(公告)日：2017-09-07

申请号：US15508696

申请日：2015-09-02

Applicant: BAE Systems plc

Inventor： Christopher Ralph Pescod ,  Mohammed Nawaz ,  Colin James Harper

IPC: H04B10/2575 ,  B64F5/60

CPC classification number: H04B10/2575 ,  B64F5/60

Abstract: Signal processing apparatus located in and/or mounted on an entity (e.g. an aircraft), the signal processing apparatus comprising: a first module; a second module connected to the first module such that signals may be sent between those modules; one or more amplifiers configured to amplify signals sent between the modules; and one or more optical fibres. The first module is located at a first location in/on the entity. The second module and the one or more amplifiers are located at a second location in/on the entity. The first location and the second location are spatially separate, i.e. remote from one another. The optical fibre(s) couple together the first and the second locations such that a signal sent between those locations is sent via the optical fibre(s).

公开(公告)号：US10702888B2

公开(公告)日：2020-07-07

申请号：US15560927

申请日：2016-03-16

Applicant: BAE SYSTEMS plc

Inventor： Lionel William John Kent ,  Colin James Harper

IPC: B06B1/02 ,  H04B11/00

Abstract: There is disclosed an acoustic transducer for communications within an operational bandwidth, the transducer comprising:A signal generator for generating a signal at a centre-frequency within the operational bandwidth;A piezoelectric element having a dielectric constant that varies with temperature;A driving electrode at the surface of the piezoelectric element;A matching network, having a natural frequency at a given temperature, and operable to transfer the signal from the signal generator to the piezoelectric element whilst mitigating electrical loss, the matching network being connected to the driving electrode;Wherein the matching network comprises a temperature compensating capacitor connected in parallel with the piezoelectric element, the temperature compensating capacitor being for counteracting temperature-induced changes to the dielectric constant of the piezoelectric element such that the electrical natural frequency of the transducer is substantially constant over a range of temperatures.