I have a simulation using Momentum GX in Genesys 2010.05 SP1 with three common ports. As expected, these three ports are simulated as a single port by Momentum. What I would like to be able to do is look at the impedance of only port 1, while ensuring that the metalized regions connected to ports 2 and 3 are also excited with the same potential and phase as port 1.
Firstly, is a common port the best way to do this, or is there another port that anyone recommends.
Secondly, regarding the S parameters that the simulation returns, specifically the ZIN1 that the data file computes. Are the S parameters only 'looking' into port 1, or are they as if ports 1, 2 and 3 are all connected together and then looking into that one port?
Thank you in advance for your assistance.
Firstly, is a common port the best way to do this, or is there another port that anyone recommends.
Secondly, regarding the S parameters that the simulation returns, specifically the ZIN1 that the data file computes. Are the S parameters only 'looking' into port 1, or are they as if ports 1, 2 and 3 are all connected together and then looking into that one port?
Thank you in advance for your assistance.
Use common mode ports in designs where the polarity of fields is the same among two or more ports (even modes propagate). The associated ports are excited with the same absolute potential and are given the same port number.
Common mode ports have the following properties:
1. They can be applied to objects on strip layers only
2. A ground plane or other infinite metal (such as a cover) is required as part of the design
3. Two or more ports can be associated
4. Associated ports are excited with the same absolute potential (and same polarity)
5. The ports must be on the same reference plane