Test Fixture Design - Matrix Fixture Dut Interface Board (DIB) Layout

$Database 'Product Docs', View 'Manuals\Cassini Manual\Table Of Contents', Document 'DUT Interface Board (DIB) Design Guide'$ 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.

DC
Digital
RF - MCX dual - 6GHz
RF - SMA single DC - 10 GHz
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.pdf

SMA 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
92_MMPX-S50-0-1 PCB layout.pdf	Questionnaire for Layout Simulations - new Jan 2010 AB.xls