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Hello Everyone,
I am simulating a small inductor which has inductance of around 50 pH. The Ansoft HFSS is adopted in my simulation.
The outside dimension is only 30 um roughly. A guard ring (PEC) is added to around the structure to let port 1 and port 2 have same reference.
The simulated...
Surface wave simulation
Hello~
I would like to simulate a grounded dielectric slab to investigate the surface wave
phenomenen.(Pozar, page 131)
However, I have no idea how to set up the waveport correctly. How do I set up the integration line correctly? Thank you very much.
hfss reference conductor
Hi, I wanna make a full EM simulation of a RF chip, made of TSMC 0.18um CMOS technology. The discription of this chip's structure is as follows. It contains many inductors and interconnects, which are surrounded by a metal ring. This metal ring will serve as a reference...
Hello:
I am simulating a CPW for a 50Ohm chracteristic impedance. I sweep gap between signal line and ground line. However, as I sweep gap, the integration line doesn't change with gap so that the simulation is wrong. My question is that may we parametrize the integration coordinates ...
Hi rautio:
Thank you for your papers. I will read these papers in near future. Could you give some comments about the phenomenon in HFSS? I am still curious about the results I have gotten from HFSS. Of course, I will try another tool to verify this.
As to the dependence of...
Hi rautio：
As far as I know, HFSS will solve the 2D waveport first. The results of 2D wave port will become the initial codition for the 3D structure. If checking the solve only option in the simulation setup, HFSS do planar simulation quickly and effeicienty. I have no ideal which...
Hi elektr0：
The micristrip line is dispersive, but the result is hard to believe. The low freuqnecy Zo is as high as 56 Ohm. If this is correct, the returen loss shall be the worst at low freuqeny. However, the return loss is lowest at low frequeny.The simulation results shown in...
Sorry! The topic should be microstrip line. Actually, CPW also has the same phenomenon.
Added after 5 minutes:
The microstripline structure is shown in the figure.
Added after 22 minutes:
The microstripline structure is shown in the attachment.
cpw current distribution
Hello everyone：
I do some simulations on Microstrip Line using HFSS. Please see the attachment. The conductor and substrate of Microstrip Line are copper and dielectric. The conductiviy of copper is 5.8*10^7 S/m. I wonder that the chracteristic impedance varies...
Hi,
There are two solution type in HFSS,including driven terminal, modal based. I want to simulate the characteristic impedance of CPW. The simulation report contains port Zo and Terminal port Zo in modal based and driven terminal, respectively. The simulation results of the two solution type...
terminal modal s parameter
Hi,
I simulate a transition sturcture from cpw to microstrip line. I start from an assumption that the cpw's gound is infinite. The cpw gap is about 7.2um and the gound width is about 200um.Then the simulation result is perfect. But as I reduce the ground width to...
Hi,
I simulate the Ustrip line and find many undesired modes.These modes seem to have no cutoff frequency,so I have no ideas how to remove them.The attachment is the simulation result. Please help me ? Thank you very much.
Hi,
I have many questions as follows.If you are free,please give me advices.
1.
As I simulate a transmission like structure,such as Microstrip line,two solutiion types can be choosed.I run the simulatiion separatey and get different resluts(for Driven modal,the mode number I set up is...
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