[SI-LIST] : SMA Impedance Matching

Bruce.Wallick@analog.com
Wed, 4 Mar 98 13:59:07 EST

Hello:
I installed a Straight Jack Receptacle (SMA female connector) on an
FR-4 PCB. TDR measurements indicate that the impedance goes down to
25-30 ohms where the connector pin actually goes through the board.

I am concerned about this mismatch. Does anyone have any input as to
how I can minimize the size of this discontinuity?

Thanks for any and all help,
Bruce Wallick