What is Delta S in HFSS?
Importantly, at each step, the scattering parameters are evaluated at each port, and compared to the previous step. The difference between the two is called “delta S”. So, in order to make sure a simulation is correct, HFSS does adaptive passes until the delta S falls below a set threshold.
What are S parameters for antenna?
S-parameters describe the input-output relationship between ports (or terminals) in an electrical system. So, if we have a communication system with two radios (radio 1 and radio 2), then the radio terminals (which deliver power to the two antennas) would be the two ports.
How do you detect convergence in HFSS?
Also, look at the profile of your simulation by going to HFSS→Results→Solution Data. In the tab “Profile”, you should be able to see information about meshing, elapsed time, memory usage, solved frequencies etc. In the tab “Convergence”, you should be able to see the adaptive passes.
What is adaptive pass?
An Adaptive Pass is for a person who (1) requires adaptive equipment or adaptive ski techniques in order to ski and (2) is legally blind, deaf, or has an amputation, a permanent disability or cognitive disability. Simply having a disability or illness alone does not meet the criteria for an Adaptive Pass.
When do you use active S-parameters in HFSS?
If you are using optimization feature in HFSS, then you may use active S-parameters. In optimization the design parameters are optimized as per the specified goal, then to monitor how the results (s-par here) are changing when the design parameters are being optimized by HFSS, you plot active s-parameters. Cite.
How to export S parameters from HFSS to ads?
Plot all the S parameters (S11,S21,S12,S22) in magnitude and as well as in phase (deg). Right click on the graph and export data in .csv. Copy the data into a notepad file and add this extra line at the top of the data: #GHz S MA R 50
When to ask for S parameters and active S parameters?
In a multi-port antenna array, when you ask for S-parameters (and not active s-parameters), e.g. S11, HFSS will only enable port 1 and treat all other ports as matched loads. In this way you’ll only see the passive S-parameters.
Do you need a feeder for HFSS or CST?
In HFSS or CST you can apply the same magnitude and phase to ur array elements, while in the real world you need a feeder to do that for you. In HFSS, you can see the passive as well as active S-parameters.