RealAEL said:To do simulate proximity effects of groundplane close to microstrip lines within ADS you would need to use EM simulation with Momentum (planar EM) or EMDS (3D EM). Regular circuit simultor models will not be able to characterize these effects.
BigBoss said:You should create an extra ground shape/layer and associate a port for this layer.Then you can simulate in schematic view by grounding this port.
mfarhan1 said:Add your ground polygon on say cond2 layer and your microstrip is at cond layer, Now add ports to your micrsotrip on cond layer on edges, then add two more port just beneath previous ports on cond2 layer which will be attached to your ground,
Now go to port edditor and select the ports on cond2 layer one by one, and select the port type as ground refference and associate them to the port one above it, thats it (keep the port type on cond layer as single port)
Change the substrate accordingly and remove the ground from there,.
substrate will be like this
air
------cond
subs
-----cond2
air
amdc said:But i need the ground on the cond.
Added after 12 minutes:
I want to have such structure
air
-----cond <------- here I need to have the ground polygone on this layer.
subs
-----ground
RealAEL said:How do you intend to create the groundplane connections on the actual board? You have to do the same thing for Momentum.
Your simple illustration would have only two ports, one on each end of the microstrip line. The ground plane can then be drawn as a polygon on the same cond layer as the microstrip lines as required.
Now, assuming you are going to have through connections within the ground plane polyogon to connect to the ground conductor on the back of the board, draw 'via' structures within the ground plane polygon as required. Draw these 'vias' on a different layer, maybe hole, and then map the hole layer as a VIA to the substrate between cond and GND.
Your substrate setup should then look as follows:
Free_Space
------- -STRIP- cond
Substrate |VIA| hole
///// GND ////
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