July 2013 Developing nanomicro satellite technology for Roke Manor Research LtdRoke Manor Research Ltd wwwrokecouk ID: 829160
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1 www.roke.co.uk July 2013 Developing nano
www.roke.co.uk July 2013 Developing nano/micro satellite technology for Roke Manor Research LtdRoke Manor Research Ltd www.roke.co.uk Contract R&D and ConsultancyDefence, National Security and Core Business: Communications, Working with partner companies and academia across Land, We are a trusted partner to the defe
2 nce and security community, combining w
nce and security community, combining www.roke.co.uk if the satellite is cheap if you have lots of them if you have good system redundancy if you have lower reliability Squaring the Circleyou can have lotsof themsystem redundancyof the art COTS Satellites in Low Earth Orbit Less Radiation HardeningCOTS components n
3 ow Hi-rel www.roke.co.uk CubeSat Stan
ow Hi-rel www.roke.co.uk CubeSat Standard developed by Cal Poly and Stanford 10cm cube (1 litre) =1U (1 Unit)Mass Typically using off the shelf components3U most popular. Up to 24U and beyondHeadline Cost Aspiration $100kInitial Usage -academic and amateur. Now moving into Affordable Space Capability or In-Or
4 bit Demonstration Courtesy of ESA Pico
bit Demonstration Courtesy of ESA Pico 11-100kg 1U CubeSats24U www.roke.co.uk CubeSats-Coming of AgeNanosatellitenow in orbit for US Army Space and Missile DefenseCommand, (SMDC-ONE) If we put five to 12 of these small satellites in orbit, it will cover most areas soldiers are operating, providing them real-time, all
5 -the-time communications (May 15)Gener
-the-time communications (May 15)General BarronsCommander UK Joint devices of all kinds are becoming smaller, more numerous, cheaper and effective (such will compete with fewer larger expensive Real operational advantage is in constellations www.roke.co.uk FUNcube: Sun-Synchronous Low Earth Orbit at approx. Sa
6 tellite passes over most locations appro
tellite passes over most locations approximately three FUNcube DegC www.roke.co.uk Off the Shelf Modules Courtesy of Clyde Space Ltd www.roke.co.uk Terrestrial Roke Technology Re-use -Examples 2 channel wideband V/UHF direction-finding receiverCellular basestationanti-jam satcomwaveforms S band and Kaband www.roke.co.
7 uk Example Antenna DevelopmentDeployabl
uk Example Antenna DevelopmentDeployable UHF/L band antennaFunded by DstlCovering useful band of interest for various, albeit undefined, communications, RADAR or Electronic Surveillance tasks as well as providing a decade of RFbandwidth as a In line with Dstlsinterest in micro/nanosatsas innovation drivers and test
8 beds for potential future satellite tech
beds for potential future satellite technologies www.roke.co.uk High Gain, Broadband Deployable AntennaNeed a structure at least 2m, stowed within 10cm so a ratio of 20:1 or more!low-frequency, multi-frequency and wideband use, e.g. HFto L-bandhigh gain for ground linksuse on nanoand micro scale platforms, e.g. Cu
9 beSatfor good efficiency at low frequen
beSatfor good efficiency at low frequencies (at 30MHz, wavelength is 10m)for high gain (large aperture) += ? www.roke.co.uk 1.Reflector Antennas2.AISATHelical antenna (DLR)3.SSL/Prof.Pellegrino4.Rolatubeand Roccorproducts5.Origami6.Patents (esp. satellites) 123456 www.roke.co.uk Design SpaceThree main aspects to consi
10 der: conductors, insulators, composites,
der: conductors, insulators, composites, shape-memory alloys, mass, thermal, AO erosion effects, etc.self-deploying elastic, spring-release actuators, memory alloys, bearings, rollers, gears, hinges, joints, motors and linear actuators electrical performance: gain, pattern, polarisation, bandwidth, etc. www.roke.co.uk
11 which is the easiest to fold, roll or sq
which is the easiest to fold, roll or squash into a small volume?Some examples of well-known high-gain and/or wide-bandwidth antennas: exponential Vee Rhombus Conical spiral www.roke.co.uk once stowed, how is the antenna deployed again?think tent poleforms or desired shape defined when first madethink ta
12 pe measure very popularsteel and non-
pe measure very popularsteel and non-conducting composites Shape-memory alloy:use solar flux as heat source to return to pre-telescopic booms, folded/hinged panels, collapsible trusses, inflatable tubes www.roke.co.uk Prototype Design: stowed RolaTubecarbon-fibre size for CubeSat end-mounted to a 3U www.roke.co.uk
13 Prototype Design: deployed total volum
Prototype Design: deployed total volume: 0.6Umass: 488g (each boom 80g)stiff changes of attitude possiblecan be optimised for freq/gainCubeSat-compliantmechanical impulse applied to www.roke.co.uk Prototype Design: resultsDesign can be optimised for best gain at specific frequencies if required.G�ain 0dB
14 i from ~100MHz up to 2-3GHzUseable down
i from ~100MHz up to 2-3GHzUseable down to 10MHz, depending on applicationEasily scalable to other frequency bandsS-parameter measurements of prototype correspond 10 -80 -70 -60 -50 -40 -30 -20 -10 20 Freq (MHz)Peak realised forward gain (dBi) 10° half angle 30° half angle www.roke.co.uk CubeSatsHave now moved f
15 rom academia to the defence domainCan p
rom academia to the defence domainCan provide an in-orbit testbedto create space heritageHave the potential to provide disruptive military capability e.g.Comms in remote areasSpectrum Sensing and target geolocationEarth Imagery Weather sensingSystem solutions can include Cubesatconstellations integrated with ter
16 restrial and GEO assets to provide enhan
restrial and GEO assets to provide enhanced performanceAllow use of terrestrial COTS technologiesSpecialist antenna designs required to optimise performanceWideband V/UHF Antenna designed simulated and built for DstlNarrow-band designs exist for GPS, S-Band, Ka-band and others www.roke.co.uk Roke Manor Research Ltd,
17 Romsey, www.roke.co.uk Deployment Demo
Romsey, www.roke.co.uk Deployment Demo Video 2015 Chemring Group PLCThe information in this document is the property of Chemring Group PLC and may not be copied or communicated to a third partyorused for any purpose other than that for which it is supplied without the express written consent of Chemring Group PLC. The i
18 nformation is supplied for the purpose o
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19 a objects included in the Work.This info
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