netherlands institute for radio astronomy aa-mid design for construction raymond vandenbrink...

Netherlands Institute for Radio Astronomy

AA-mid design for construction

Raymond vandenBrink

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1WP. Tile Development

The project “SKA Noord-Nederland” is

collaboration between ASTRON, Major,

Neways, Isiterra and S&T.

SKA-NN is supported by subsidies from the

EC/EFRO program and the

Samenwerkingsverband Noord-Nederland

(SNN) Koers Noord program, and from the

Province of Drenthe and Groningen.

Overview

Antenna concepts

Various

W-Plates

Quad Modules

Housing concepts

Vacuhouse

Rotohouse

Continuing Array

Tile and Station design

WP. Tile Development 2

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The project “SKA Noord-Nederland” is

collaboration between ASTRON, Major,

Neways, Isiterra and S&T.

SKA-NN is supported by subsidies from the

EC/EFRO program and the

Samenwerkingsverband Noord-Nederland

(SNN) Koers Noord program, and from the

Province of Drenthe and Groningen.

ANTENNAAAVP

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WP. Tile Development

ANTENNA CONCEPTS

Various concepts judged on:

Performance

Reliability

Cost

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POTENTIAL CONCEPTS

TWO potential directions

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W shaped plates

QUAD modules

Antenna concept – WplatesASTRON-RP-441_AAVS concept antenna – Wplates.doc

+No or less profiles (EMBRACE)

+Connection by clinching

+Less parts

--- Less labor, less time, lower cost

+Selfsupporting

+Thinner

--- Less material, lower cost

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First prototypes to test;

Shape

Production possibility

Assembly

Stiffness (different thicknesses)

(0,6 ; 0,8 ; 1,0mm)


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Second prototype includes;

Features to hold feedboard

Cutting strategy to maintain shape

Connection options for testing (ongoing)


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Support broken after assembly

Proto cost per element : 13,00 Euro

Final cost per element : 0,90 Euro

-Based on quotations 2011-


Under investigation;

Connection between tiles

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Antenna concept – QUAD ModulesASTRON-RP-XXX_AAVS concept antenna – QUAD Modules.doc

+No profiles (EMBRACE)

+Connection by clinching

+Less parts

+Better manageable parts

--- Less labor, less time, lower cost

+Selfsupporting

+Thinner

--- Less material, lower cost

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QUAD Modules (QM)

QM1 experiment with profiles

QM2 experiment with flexible edges

QM3 experiment with clamps

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QM1

QM2 QM3


QM2 tested;

Mechanical unstable

Bad connection

Possible solution under investigation

Proto Cost per element 25,00 Euro

Final Cost per element 0,80

QM3 still to be tested

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HOUSINGAAVP – SKA-NN

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Housing concept – VacuhouseASTRON-RP-436_AAVS concept housing – Vacuhouse.doc

+Parts of 3m x 1.5m possible

+Tiles of 3m x 3m possible

+± €180,- / m² possible (for 2000m²)

Made by vacuum forming

– Limited in size / No continuing antenna

– Less integrated features possible

– Required module size still unknown

– Suitable for small series

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Housing concept – RotohouseASTRON-RP-437_AAVS concept housing – Rotohouse.doc

+Max 4m diameter possible

+More detailled features possible

+Accuracy of mould

+High freedom in design

+± €90,- / m² possible (for 2000m²)

+Water gutter integrated

– Limited in size / No continuing antenna

Made by rotational molding

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Housing concept – RotohouseASTRON-RP-437_AAVS concept housing – Rotohouse.doc

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Housing concept – Continuing ArrayASTRON-RP-XXX_AAVS concept housing – ContinuingArray.doc (tbr)

+Connects diagonal oriented vivaldis in orthogonal direction

+“Infinitely” expandable

+Edges can be closed

+No corner pieces needed

– Assembly in desert required

– Smaller unit more labor

Made by injection molding (most parts)

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Housing concept – Continuing ArrayASTRON-RP-XXX_AAVS concept housing – ContinuingArray.doc (tbr)

Useable for small and large configurations

Water gutter integrated

Support pole also guides water

To be prototyped: beginning 2012

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TILE AND STATION DESIGNAAVP – SKA-NN

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TILE

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Cover

SideSupport

Pole

Vivaldi

OCTA boardCombi board Centerboard

SUPPORT

Injection molded makes integration possible;

Features to fix PCBs

Features to fix tiles

Features to fix antennae

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-Injection molding-PP or ABS


CENTRE and COMBIBOARD

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Combiboard fixed.

Centreboard placed, Combiboards attached.


OCTABOARDS

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OCTAboards placed

OCTAboard fixed

GROUNDPLANE

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Pre-shaped groundplane• Features for contact with other tiles• Holes for connectors• Holes for antenna mounting

-Lasercut or stamped-Aluminium thin sheet (0,3mm)

VIVALDIS

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- Lasercut or stamped- Aluminium sheet (less than 1mm)- Clinched in groups of four- Fixed at bottom

Vivaldis placed in groups of four

Vivaldis go through support and are being fixed at the bottom.


COVER and POLES

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Cover placed on top

-Injection molding or vacuum forming.-PP or PE

-Extrusion or injection molding-PP or ABS, perhaps PVC (common in extrusion)

Poles to support the cover both when used in the middle of a station or at the edge.Also to close the corners.


(expandable) MODULE

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-Injection molding or vacuumforming-PP or PE


ARRAY of FOUR CONNECTED

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Tiles are connected by snap feature.Connection in diagonal direction.

STATION

Station layout non-continuous

No assembly outdoors

Maintenance / replacement easier

Enough space for water (rain)

Testable units

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Station layout continuous

All elements connected

Small units

Assembly partly in the field

Replacement almost impossible

Both scenarios under investigation

Thank you

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netherlands institute for radio astronomy aa-mid design for construction raymond vandenbrink...

Documents

tile development slide

aavs concept antenna

antenna aavp

ongoing slide

array tile

qm1 qm2qm3 slide

station design wp

euro final cost