Hello, i need to use the follwing connector for the pcb stackup shown below.
I know that the middle layer is the ground for RF.
How does such connector works with the PCB?
How does this connector connects to the midl layer as its ground and top layer as signal?
https://mpd.southwestmicrowave.com/wp-content/uploads/2021/06/1492-02A-03A-04A-12.pdf
https://www.qorvo.com/products/d/da007868

 

 

We use these at work. Summary: the launch pin sits on the trace (tapered up or down to the pin width), while you need to have a sizeable ground pad on either side of the trace that contain GND vias to layer 2, while also having mounting holes that go top to bottom. Backside of the board should have a GND plane that connects up to the RF GND by some vias as well where the connector sits. It'd end up looking (roughly) like this on top:

And this on bottom:

That inner rectangle is the RF GND (bigger than the connector), while the metal separated from it is the DC GND (if you are keeping DC and RF GNDs separated - otherwise, you don't need the gap). Layer 2 then is just a full plane over the entire board for RF GND.
The taper isn't necessary, but it can help with the transition from coax to microstrip.
Don't forget to keep this area free of soldermask.

 

Hello , from the photo below i see that i need Guard VIA surrounding the trace and 2 mounting holes.
both VIA and mounting holes are going thew the whole PCB.
how does the connector know to connect to the inner middle RF GND layer?
Thanks.

 

The backside RF GND plane is connected to the topside RF GND plane and the layer 2 RF GND plane by the vias. The connector is a clamp-on, so the top half of the "clamp" makes contact with the top RF GND, the bottom half of the "clamp" makes contact with the bottom RF GND, and the vias assert that there is an electrical connection from both to the layer 2 RF GND.

 

Hello, i am having trouble to imaginge your words.
Could you please draw roughly how the conector clamps on the PCB shown below?
Thanks.

 

Crudely drawn, it looks a bit like this. The next picture kind of illustrates what it looks like on a board:

The next pictures show a side view of a similar connector (not Southwest Microwave-branded, but connects nearly identically):

Hope this clears things up!

 

Hello, i am having trouble to imaginge your words.
Could you please draw roughly how the conector clamps on the PCB shown below?
Thanks.
View attachment 312629

Looks like a stripline to me. That seems to be a problem with your selected edge clamp connector.

https://store-68dp4b.mybigcommerce.com/content/Technical_Articles/SMI-End-Launch-Connectors.pdf

https://resources.altium.com/p/stri...-differences-and-their-pcb-routing-guidelines



https://resources.altium.com/p/stri...-differences-and-their-pcb-routing-guidelines