ALTERNATIVE MECHANICALS

DVA1 Meeting at NSF Arlington VA

April 15-16, 2010

Matt Fleming

Contributions from

Jack WelchRoger SchultzGordon Lacy

Image of current TDP Concept

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TDP Pedestal Mount & Frame

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ASAKAP 12m CETC54

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KAT7 Mount

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KAT7BAE (previously IST Dynamics)

People – Antenna Structures - BAE

GD SatCom Cobham/ Patriot

Antedo mount

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Roger Schultz

CETC54 15m

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CETC54 15m Mount

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Elevation Part

Azimuth Part

Pedestal

Panel Type 15m

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Roger Schultz

Panel Type 15m

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Roger Schultz

Panel Layout Roger Schultzfor DVA-1

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Roger Schultz suggests near rectangles at large end

Panels for 3000 Antennas

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Panels should be designed for max area and container transport

Support structure should be rectangular space frame with nodes allong panel seams

Matt’s suggests throw away pie shape concept and use rectangular panels

Still make use of throuted design for El axis near reflector.

Yes each panel is unique and tooling will be very expensive

Antenna Design Drivers

1 Must achieve survival. ( 100 mph wind )

2 Low cost per unit area of aperture. ( good sky coverage ) ( installed )

( low cost materials, low mass design, low fabrication labor ) ( favors symmetric )

3 Very low operational cost for a 30 year life( very few maintenance visits required )

4 Frequency range of 0.3 to 10 GHz with WBSPF( 3.5m Gregorian secondary ) ( favors offset )

5 Excellent Ae / Tsys.( accurate surfaces, controlled spillover, low diffraction ) ( favors offset )

6 Exceptional dynamic range.( very rigid surfaces, very good pointing, )

pt source sensitivity

survey survey speed

Performance vs Cost

Tradeoffs

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Questions

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