SKA-Japan Industry Forum [SKA-Japan Workshop 2010] EMC & Microwave Systems November 05, 2010.

SKA-Japan Industry ForumSKA-Japan Industry Forum

[SKA-Japan Workshop 2010][SKA-Japan Workshop 2010]

EMC & Microwave Systems

November 05, 2010

§ Exchange latest technologies

§ Dispute the sub-system specifications with Japan SKA Consortium (Science Astronomers)

§ Experimental trial and evaluation of the system performance

SKA Industry of SKA Industry of JapanJapan

Square Kilometer Array Industry of Japan 2

Status of SKA Japanese Industry Forum

Sep. 2009 Kicked off the industry meeting call for NAOJ and Japan SKA consortium

Dec. 2009 Started the SKAIJSKAIJ by the up and coming companies

Jul. 2010 Came together 9 companiesBegan to discussion the Japanese contribution


Relationship of SKAIJ

SKAIJSKAIJ

NAOJ

Japan SKA consortium

(Science astronomy)

SKA IEACSSECSPDO

International engineering community

SKA Contribution

RequirementsRequirements

RequirementsRequirements

InformationInformation

Exchange technical issuesExchange technical issues

Collaboration / PartnerCollaboration / Partner

ApproachApproach

［［ New New TechnologiesTechnologies ］］


Desired engineering goal ！

Key futures Frequency coverage

SKA mid-band to SKA semi-high-band feed 3-20GHz decade band

Integrated receiver Low power and cooling wide-band LNA High frequency and wide band ADC

Ultra high speed gigabit data transmission Digital beam forming

100 instantaneous beams and 2 polarizations

Wideband direct sampling digital receiver and feed

WidebandWideband HomodyneHomodyne FrontendFrontend

KEYWORD KEYWORD !!


Development concept

Low power consumption

Cost effectiveMaintainability

Light weightCompact space

WidebandInstantaneous beamMulti-beams

Wideband

HomodyneHomodyne Frontend

Ultra high speed InP HBT 3bit sampler

NTT Photonics Laboratory

(3 mm × 3mm ）

Kawaguchi@SKA-JP WS 2008

20.480-24.576GHz (BW = 4.096GHz) Direct sampler (8.192Gbps)


Experimental Experimental TestTest

3bit A/D Converter3bit A/D Converter

Proof of concept Proof of concept Homodyne Homodyne receiversreceivers

W49N spectrum using traditional heterodyne receiver

W49N spectrum using high speed direct-sampling

Trial model of wideband feed

Kouzuma@EAVNWS2010

Re

turn

Lo

ss [

dB

]

Tapered Slot AntennaTapered Slot AntennaEvaluationEvaluation


Trial model of A/D converter package

from SMIED

Compare new package with wire Compare new package with wire bondingbonding

Trial modelTrial model


Insertion Loss [dB] Time domain reflection

Test probeTest probe

RF characteristicsRF characteristics


Potential Sub-system


Hori. Pol.

Feed Element

Cooled LNA

Tsys(Rx) = 100K @10GHzGain = 17dB

Cooling = 20K

Vertical Pol.

Feed Element

Cooled LNA

2 – 10GHz

High Speed ADC

Analog input > 12GHzSampling rate = 8Gbps/ 3bits

10GbE Frame

E/ O

E/ O

E/ O

10GbE

10GbE

10GbE

High Speed ADC

10GbE Frame

E/ O

E/ O

E/ O

10GbE

10GbE

10GbE


3bits

3bits

Tsys(Rx) = 100K @10GHzGain = 17dB

Cooling = 20K2

polarizations WBSPFWBSPF

Cooled LNA

Cooled LNA

High Speed ADC

E/ O

Central processing

I mage processing

High Speed ADC

100 beams × 2 polarizations3 ～ 20 GHz

× 100

Beam forming

processing

Tsys(Rx) = 30KCooling = 20KGain = 20dB

40Gbps


3bits

E/ O

E/ O

O/ E

O/ E

O/ E

E/ O

40Gbps

E/ O

E/ O

O/ E

O/ E

O/ E

Cooled LNA

High Speed ADC

E/ O

E/ O

E/ O

O/ E

O/ E

O/ ECooled LNA

High Speed ADC

E/ O

E/ O

E/ O

O/ E

O/ E

O/ ECooled LNA

High Speed ADC

E/ O

E/ O

E/ O

O/ E

O/ E

O/ ECooled LNA

High Speed ADC

E/ O

E/ O

E/ O

O/ E

O/ E

O/ E


Network

Tsys(Rx) = 30KCooling = 20KGain = 20dB

Tunable fi leter(BW = 8GHz)

Tunable fi leter(BW = 8GHz)

40Gbps

Tsys = 50K


Challenging Sub-system

2 polarizations

WBPAFWBPAF



Focus on Challenging

Wideband radiator (Feed) Carry out decade band Compact space

Integrated Receiver Analog part

Indium-Phosphorous LNA with cryogenic cooling Low power consumption, light weight, compact space Applicative existing cryogenic cooling technologies

Digital part (Direct digital sampling) High speed wideband A/D converter Improvement analog input transmission in the A/D converter Ultra high speed data output

Extreme volume digital beam forming Large volume of digital data from feeds

Sales productsSales products



New developments and future directions

SKA semi-high-band feeds Phased array 3-20 GHz 100 instantaneous beams x 2 polarizations

LNA with Cryogenic cooling Low power consumption Cryogenic cooling

Whole analog section or individual LNA

Wideband

A/D converter Analog frequency : ~20 GHz Sampling rate : ~16 Gbps / 3 bits


Timeline

2008-12 Telescope system design and cost

2012 Site selection

2013-15 Detail design and pre-construction phase 　

2016 Advanced instrumentation program decisionAdvanced instrumentation program decision

2016-19 Phase 1 construction

Our target time frame of Our target time frame of new developmentsnew developments


SKAIJ (Engineering)


SKAIJ future activity

Create our homepage Keep up-to-date with the development status

Deliver latest information

Undertake information gathering Come into international events to get development status

and new technologies

Come out with the development status and test results


Conclusion

Specification Frequency coverage

RF band : 3 – 20 GHz

Bandwidth : 8 GHz (16 Gbps nyquist)

Phased array feed per antenna Number of beams : 100 instantaneous

beams

Polarization : Horizontal and Vertical

Low noise amplifiers Amplifier noise temperature : Tsys = 30K

Cooling temperature : 20K cooling

Number of LNAs : 200 ea. per antenna

Thank you.

EMC & Microwave Systems 1-6, Yaesu 1-chome, Chuo-ku,

Tokyo, 103-8284 Japan

TEL:03-3245-1244 / FAX:03-5205-2030

E-mail:[email protected]

http://www.toyo.co.jp/microwave/ http://www.toyo.co.jp/cal-lab/en/

Contact SKA Industry JapanContact SKA Industry JapanToshiki KumazawaToshiki Kumazawa

Toyo CorporationTEL : 03-3245-1244FAX : 03-5205-2030

E-mail : [email protected]

SKA-Japan Industry Forum [SKA-Japan Workshop 2010] EMC & Microwave Systems November 05, 2010.

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