[SI-LIST] Opinions wanted on Signal Integrity analysis tools

Hi,

At present, I work for a small company that does gigabit design, 
pretty much by experiment. If we do not make our return loss 
specification, we take some copper away from the ground layer, or do 
something else, until we do make it. We may turn the board a few 
times but that is the way it goes.

I have done a number evauations of programs that do EM analysis, 
such as AWR Microwave Office, CST Microwave Studio and Sonnet EM 
Suite. 

I would like to know if there is an opinion in the group concerning 
any other programs that are generally used. For example, I have read 
some data about Cadence Specctraquest. Specctraquest, however, 
appears to be more model based (pspice) than EM based.

Before I make a proposal to management for capital equipment, I 
would like to get more opinions for the SI group.

The main challenge that we have, is the mating of high speed 
connectors to the PCB. Sometimes we can get spice models of the 
connector, by itself, but that does not do us much good concerning 
the mating interface of the PCB pad to the connector pin. 

Thank You
Tom







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