Detector to chip

Detector to chip

Electronic here

Detector (here only bottom stack)

PCB

Specs

• <3 GHz bandwith• As small as possible to limit dead space• As simple as possible• Possibility to dissemble

Transition 1

Strip dimension shrink (W/L = cst)

Transition here ?

Transition 2

Continuous microstrip to coplanar transition

Problem: Transition 1 & 2 implies coating a PCB with an angle which might not be possible and expansive

Real world implementation

Instead of having an angle in the PCB the angle can be made via staking of layers. In PCB we can have up to 16 layers. Need to be simulated.

Vias not represented here

Transition 2 simplest implemetation

Transition 2 improvement

improvement

Field rotation

The via transition could be replaced by progressive stacking of layer for a smoother transition.

Status

• Model being put in HFSS for field simuation.• PCB card design started with the help of

Mircea.• Help given by Xioahuan (Klaus’ student)

working on the same issues.• All ideas to go from PCB to microstrip are

welcome.