RI Title
RI logo


Database 'Product Docs', View 'Manuals\Cassini Manual\Table Of Contents', Document 'DUT Interface Board (DIB) Design Guide'See Also DUT Interface Board (DIB) Design Guide for more overall design information and examples.



DIB Layout for the Matrix Top Plate

There are five types of interfaces to the DIB in regard to the Matrix fixture.
  1. DC
  2. Digital
  3. RF - MCX dual - 6GHz
  4. RF - SMA single DC - 10 GHz
  5. MM wave DC - 40GHz

    1. DC Interface:

    The DC interface is basically comprised of a Delrin block with pogo connectors pressed into it. It is a 4X4 matrix with 0.100 pin centers.
    DIB Pogo Landing
    DC 16 Block
    Jumper Install DC 16 Block





    2. Digital Interface:

    The fixture digital interface incorporates a controlled impedance for each of its contact pogo pins. The block is a 5X6 Matrix with the pogo pins soldered to a PCB back plane.

    NOTE: Digital blocks can not be placed side by side due to connector!!!
    Digital Pogos
    Digital Cable Side
    Digital with Cable
    Digital landing
    (See Block Pin Out Below)



    3. RF Dual MCX - 6GHz:

    DO NOT USE FOR NEW DESIGNS, Use RIK0117A instead.

    This interface is composed of a single block with two MCX panel mount connectors side by side. It is intended to be for RF connections with a bandwidth up to 6Ghz. The DIB interface has a cutout "tongue" that makes contact with the connector center conductor.

    NOTE: 50 Ohm trace is intentionally placed at edge of launch center conductor nearest DUT to prevent parasitic stub effects at frequency.


    MCX Interface
    MCX Cable Side
    MCX Landing

    (MCX straight cable only)

    4. RF Single SMA - 10GHz: RIK0117A

    The SMA interface block is a mechanical assembly composed of a single press-in connector and brass mounting. The DIB interface has a cutout "tongue" that makes contact with the connector center conductor. Placement of the grounding pads and their related ground vias is critical. They have been optimized for best performance and their locations should not be adjusted from the gerber template locations.

    NOTE: 50 Ohm trace is intentionally placed at edge of launch center conductor nearest DUT to prevent parasitic stub effects at frequency.



    SMA Cable Side
    SMA Interface Side
    SMA Landing


    5. RF Single SMA - 15GHz: RIK0212A
    Consists of a single press in SMA adapter. It is designed for use on the Matrix top plate and is placeable at 0.5" pitch. It is intended to be for RF connections with a bandwidth up to 15 Ghz. The DIB interface has a cutout "tongue" that makes contact with the connector center conductor. Each of the ground pads have their own "tab" for connection.

    NOTE: 50 Ohm trace is intentionally placed at edge of launch center conductor nearest DUT to prevent parasitic stub affects at frequency.

    15GHz SMA Cable Side
    15GHz SMA Interface Side
    15GHz SMA Landing
    SMA 3 launch dim DIB expanded.pdfSMA 3 launch dim DIB expanded.pdfSMA 3 launch dim DIB.pdfSMA 3 launch dim DIB.pdfPDF mechanical drawing with dimensions



    6. RF Single MMPX - 40GHz: ( RIK0156A )


    MMPX 20/40GHz Cutout
    (Board Bottom to 20Ghz)
    MMPX 40GHz Installed
    (Board Top to 40GHz)
    MMPX Extraction Tool
    RIK0257A

    Trace is coplanar

    92_MMPX-S50-0-1 PCB Layout
    Questionnaire for PCB Layout Simulations to Huber+Suhner

    Clamp Drawings:

    W1MFEUWA.pdf W1MFEUWA.pdf W1MFEUVA.pdf W1MFEUVA.pdf

    Top Plate Assembly:

    The fixture top plate assembly includes the top plate, pedestal support, pedestal, DIB, and DIB clamp.
    Pedestal & Support





    Support / Pedestal / Dib / Clamp Sandwich





    Installed Blocks on 0.50" Pitch



    Matrix Top Plate




    DIB Bottom Side


    Notes: Consider using double layer solder mask over DC lines to prevent shorting to pedestal support.


    Top Plate With Blocks




    Matrix Top with Pedestal and Support



    Matrix Top with DIB and Socket


    Example Gerber and DXF and Drill Files: (Accessible online @ http://roos.com/docs/DFES-8D3W59?open )
    Y000CCA0.zipY000CCa0.pdfY000CCa0.pdfGerbers

    Matrix_TopPlate_DIB_Design.pdfMatrix_TopPlate_DIB_Design.pdf


    Finish Callout for FR-4 or Rogers:


    PrintEmail Link
    https://roos.com/docs/DFES-8D3W59
    ROOS INSTRUMENTS CONFIDENTIAL AND PROPRIETARY
    ©2011-2022 Roos Instruments, Inc. All rights reserved.