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56 Threads found on edaboard.com: Terminal Driven Hfss
For Filter design driven mode is good specially if it is waveguide based filter. As in S-matrix solutions will be expressed in terms of the incident and reflected powers of waveguide modes. In case of microstrip based structure you can choose driven terminal, as S-matrix solutions of multi-conductor transmission line ports will be (...)
HI, i have designed an cavity backed antenna in driven terminal using two co-axial coaxial feed length is 40mm..if i assingned air as material to the cavity i can run the simulation without the error and my return loss value is less than -10db.if i am assigning copper as material to the cavity i am getting very low return loss.what mat
In hfss, I'm trying to create a simple cylindrical parallel plate capacitor, but I'm having issues assigning wave ports. I'm using a driven terminal solution type in hfss V17.1 I've created a dielectric of quartz as a cylinder with radius 25mm, depth 20mm. I've created two sheets, each with radius 17mm (half the (...)
Hi kagawa, The error is telling you that the port needs to be in contact with at least two conductors -- that's how driven terminal works. If you're just trying to excite a slotline mode, a driven Modal may be better for you. Good Luck
Are you sure? It looks like terminal 1 is just the outline of the face of trace 1, which is FR4 epoxy, not a conductor. I'm more familiar with driven modal than driven terminal solutions, but I don't think it likes assigning a terminal on the epoxy.
The file you attached runs fine for me. However, I'm not sure why you have it set up as a driven terminal simulation. I switched the simulation driven modal and the simulation data was better -- your antenna just seems to be very poorly matched to the port impedance (50 Ohms).
What do you mean by "real results"? Also, is there any particular reason you're using driven terminal? Usually if you're referring to certain modes, e.g., microstrip modes, you want to use driven modal. The scattering parameters from a driven modal simulation will of course give you the coupling between the lines.
you should set hfss->solution type as terminal, then you can get a window like that.
Hello, I am using driven terminal for my simulation with some 50Ohm CPW waveguide. On getting the results, I want to simulate for the given power in dBm, how much current I will end up running through some sections. However in driven terminal the excitation is in terms of incident voltage. May I know if I should take (...)
Hi, 1) make sure the rectangle is drawn properly (assuming you're using driven terminal lumped port) and check the material assignment for the reference ground 2) not sure what execution error is it. I once had it and it was because i did not have enough hard disk space. you can check into this area. Natnoraa
Hi all, Newbee, first post, and still learning the rules and etiquette of this place. Be easy, k. Here's the synopsis: I'm running an hfss driven terminal solution. The design is a spiral transformer--a single loop primary around a flat archemedean spiral of a few turns. I've read in various places that specifying port impedance (...)
I am modeling a microstrip patch antenna using driven terminal solution and coax with waveport feed in hfss. Can I know in hfss which TEmn, TMmn, TEM modes are excited? Where can I see this info in hfss? Also, when do I use the driven modal or the eigenmode solutions? Or what information (...)
Hi everyone, I met a problem when I use hfss's driven terminal to simulate a structure. It is a warning, "Fast sweep setup, process hf3d: Poor convergence in seeding data." My simulation setup is following, Solution Frequency: 14.25GHz - Adaptive Solutions Maximum Number of: 20 Maximum Delta S: 0.02 - Adaptive Options Maximum Refin
Would please anybody complete this patch antenna that i have attached...!! I Am confused on how to excite a Coplanar waveguide fed.. and which solution setup would be applied driven model or driven terminal, I read the Help section ... but technical terms is hard to understand. Moreover, I am new to hfss, considering a Good (...)
I am trying to make some structure shown in the attach picture. This structure should have uniform near field magnetic field on one side of it. As it is differential mode, so I was trying to use driven terminal. But when I set the wave port, it says that no conductor found on the port. I am sure I set the material right and there do is conductor c
I am simulating a patch antenna in hfss with a probe feed. The probe is excited by waveport on a coax similar to the hfss example. My coax height is just 2mm and radius is 1.6mm. Coax pin is 1mm radius. My bandwidth frequencies are 2-2.8 GHz. I am using the driven terminal solution. I am not sure if the size of the waveport (...)
I have designed a helix antenna. I used antenna design tool kit in hfss to create the model. to analyze the model I changed the solution type to driven modal but a message appeared: terminal 'coax_pin_T1': terminals are not used when the solution type is driven modal. Is my analysis in this situation (...)
I have made a dipole antenna, and I drove the two differential input ports with the waveport in differential driven terminal mode. The simulation went well, but when I plot the far field, it was found that the field is actually the single input field, not with differential input. I tried both simulation mode: driven model and (...)
thanx for ur reply but i have also excited it with lumped port but it is giving error like no terminals are assigned. so i am not getting that where i am making the mistake do u have any idea......????
Use driven terminal rather than driven Modal for your excitation... I have also attached an example file that shows several setups for various transmission lines in driven terminal. Have Fun


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