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1000 Threads found on edaboard.com: Finite Ground ie3d
Hi, Kishorekumar: Normally, finite ground plane will degrade circular polarization. Best regards,
HOW CAN I GIVE A PORT TO finite ground PLANE AND INfinite ground PLANE USING ie3d?
i am currently doing my project work related to Defected ground Plane Structures in ie3d.I am facing an error while simulating the DGS antenna or any finite ground plane queries are : 1) what feeding mechanism is used for finite ground plane structures 2)how to we define the port for (...)
HI Ansoft ensemble and ansoft designer are not suitable for simulation of structures with finite ground plan.ie3d is better.
Hi, Jayanthi: I checked both of your structures. There are problems on both of them. 1. For the infinite ground plane model, you define No.0 substrates as good conductor. It is correct. However, you also define the finite ground plane shape as some polygons on z = 0. On ie3d, this means you dig a hole (...)
Hi everyone, I want to model radiation pattern of a dipole antenna above a finite ground plane with Method of Moments (without Software like ie3d or FEKO), but i don't know how. my main problem is in finding Integral Equation of problem. can anyone help me??? Thanks,
hi, please send me above specification .geo file.... m stuck with trial and error method. further i need to implement wilkinson pwer divider. so please send me .geo file with finite ground plane. m working on ie3d
Hi everyone, I assume that in Momentum only infinite ground plane can be properly defined. However ground reference ports are available. Did someone already experiment with them? They would allow you to define finite ground plane.
Hi, i want to know, how can i calculate the finite ground plane for a microstrip patch antenna and microstrip patch array? Thank, I am looking foward to hear from you at your earlies convenience.-
hi,pls more details,if u want to simulate with finite ground(dimensions arbitrary) u can use HFSS,FIDELITY (FDTD),CST packages,for ur element and simulate ur s par. regards
I tried a finite-ground singlewire layout simulation in Momentum for a 7-metal process. I chose AM as the signal layer and M1 as the ground layer. The ground layer has the same length and a three-time width as the signal layer. Two 50ohm ports are made by AM layer. Then I ran S-parameter simulation in Momentum. However, (...)
Hi, Kbmanick: 1. To convert your structure to finite ground, you just need to define the No.0 substrate to air and draw the shape of the finite ground plane there. I will e-mail you an example by assuming a finite ground plane size. 2. Your antenna is resonanting at about 5.5 GHz. You (...)
u hav to model a finite ground plane in edaboard itself good papers on uwb antennas are posted ..or u should go through Mic and Opt. Tech Letters and IEEE journals
Hi, everyone. I have a question about the ADS Momentum finite ground plane simulation. I know that in order to get a good results for the software based on MOM, a infinite ground plane is needed. However, I also want to try the finite ground plane simulation in ADS Momentum. However, (...)
Hi friends, I am trying a simple simulation, such as a monopole on a finite size PEC ground plane. How do I model it in HFSS? What I did is that I assigned the plate as PEC, but not infinite ground plane. Then I used either a wave port or lump port for excitation. I had air box all around the monopole and the plate. I mean (...)
Hi If you have a patch antenna with finite ground plane. How to setup the airbox correct? I have used minimum \lambda/4 as a distance to my antenna structure. But lets say you have an antenna with a very small ground-plane and you still need the \lambda/4 as minimum distance. Then there is a gap between the antenna and
u can use HFSS to do works fine but u know with a finite ground plane your gain would be 3-dB less than what it is supposed to be and the sidelobe levels shoot up.the concept of finite ground plane is when u assign the dimensions of it less than 10*lambda.anything more than that is considered infinite (...)
I am simulating a linear microstrip array for wi max applications at 2.4Ghz....while considering the effect of the finite ground plane..the resulting return loss is very low about -5db and the radiation pattern has a large back lobe.... is this results correct ...please help me i have only a limited time for my project completion...
I work in design UWB microstrip patch antenna with finite ground plane and i want to know what the boundary condition can i assign to get the result what boundary condition for the finite ground plane ??? i design using Ansoft HFSS 11 Thanks in advance Eng.M.Hassanien
Hi, everyone I just begin to learn ADS. i want to design a 50ohm coplanar waveguide with finite ground. I know the linecalc in ADS can be use to obtain the gap and wide value of infinite CPW. Is this tool still valid to for CPW with finite ground? I have seen dr_em(
Hello , I want to simulate a W band 50 ohms finite ground conductor backed CPW line. I am using HFSS . I am not getting proper result. My problem is on changing the waveport size , the impedance of the CPW also changes for the fixed dimensions , so how can I exactly get the CPW dimensions for 50 ohms . My subs is er=3.38 and thickness=0.203
hii, i am working in HFSS v.10 and i am designing a spiral microstrip antenna with finite ground plane. However, i am getting most of the radiation below ground plane. Please help me detecting the problem with my design. i knw i can use finite ground plane but its impractical. i have to fabricate this (...)
Hi, I am new to ie3d and am trying to learn it. I would like to use it to design PCB antennas (inverted-F, meander line, etc.). Most examples I've read so far use an infinite ground plane. My question is: what is the difference between using an infinite and a finite ground plane? (...)
Im trying to model a patch antenna on a finite ground and substrate.I followed the manual in creating the finite substrate.But after the meshing when i try and simulate, it gives me an error message. "remove current graph from list remove current graph from list of simulating finite dielectrics" Could someone tell me (...)
Define a layer's sigma to a very large value for infinite ground. then Define a finite ground as some polygons.
Hi All, I've been using ie3d to make numerical calculation (simulation) on my MSA project. It's a 3 layers patch antenna. Until now, I've used the infinite ground plane and infinite substrate on ie3d. The next step, I would like to use finite ground plane and (...)
hi friends i am designing monopole antenna for UWB application with the finite ground plane ,but the ground plane is not completely below the hole patch its limited on finite dimension 2D view of my problem is given below please help me if any body having any idea about finite (...)
In ie3d help, you can find how to define finite ground plane. In the basic parameter menu, use sigma=0 for Ztop=0; it means that there is no infinite ground. Then you can define all the layer you need (please see the manual of ie3d).
i dont think dats d far as i ie3d finite ground plane is only possible by setting real part of conductivity of 0 layer to 0 and den d process i mentioned before.... regards
I have a simple 8 dipole design I want to simulate using Zelands ie3d but I cannot see how you specify the tracks on two sides of the FR4 substrate. I can add substrates. OK I can add tracks. OK Basically its two "H" shapes like this: H H Where the top of the "H" (squared off U shape) is on the top of the PCB and bottom of the "H" is on t
how i can define GCPW with finite ground in ie3d ?
hi, i am trying to simulate a grounded CPW structure with the specs. given below, in ie3d upto 50 GHz. ie3d is giving some medium warnings - saying the port separation factor for the ports are too big and suggesting that i should reduce the distance between the positive and negative ports. wat should i do?? in that case, should i (...)
hi, i have a basic doubt in defining the port in case of grounded CPW structure - in the ie3d manual it is mentioned that while defining port (advanced extension/extn. for MMIC) we should define port only to a part of the finite CPW ground for higher accuracy, but my question is that - wat should be the size of that (...)
Hi Jian, Thanks for your timely help. Can you please clear one more doubt? How to extract shunt inductance using ie3d? Should I use any extension line as one end of the inductor line is short circuited for feeding the inductor? If I want to use a finite ground plane then what should be the dimension of the finite (...)
Hi, jayanthi: I checked your structure and results. I can see there are many up and down in the s-parameters. You may consider it as instability. In fact, I believe it is not. It should be true resonances caused by the finite ground plane and the 2 monople like structures in the finite ground plane. Basically, they are (...)
Hi, Pennylsn: It is simple. For example, you have draw the finite ground (or define an infinite ground) on z = 0. You also define the patch on z = 3 mm. You want to build a shorting plate from 3 to 0. What you can do is to select an edge of 2 vertices on the patch at z = 3. Select EDIT->ADD VIA ON EDGES command. Enter the (...)
Hi, Chest: From the look, it seems that it is modeing a finite ground patch in the manual while your built is modeling a patch on infinite ground. In order to make it finite ground, you need to define the No.0 layer's conductivity to 0 or some very small value, and put some polygon(s) to (...)
Hi, poyinting: On ie3d, the scattering field is defined as the field scattered instead of reflected. When you define infinite substrate, there is scattered field and reflected field. Reflected field is a plane wave when the incident wave is planewave. Scattered field is a spherical wave. In some sense, if you model a patch on infinite (...)
Hi, Jayanthi: I checked your model. It is ok. The pattern is not complete omni-directional. However, given the structure, it is like that. There is a dip at theta = 90 degrees. It is caused by the infinite extended substrate. If you use finite substrate, the dip will be gone while the overall pattern shape is still like that. It is impos
Hi, Chest: I don't see serious problem in your structure. I tried the finite ground plane model on it. It is slightly different from the infinite ground model. The difference is mainly due to the fact you chose very thin substrate for 10 GHz. In fact, there might be 2nd order mode in the transmission line due to the thick (...)
Hi, hsean: I checked the structure. I see some incorrect parameters "t=1.6 and l=1.3". I assume they are "t=1.3 and l=1.6". Otherwise, I don't see other mis-match in the parameters between your built of geometry and the one discussed in the paper. However, for your finite GND model, you define -1 port over a very wide edge. This normally shou
Hi, MRAJAHARSHA: There are only two choices: 1. Make a hole on an infinite ground (define horizontal polygons on the infinite ground to represent the slots on the ground) 2. Make a hole on a finite ground (use the way described by baraguru). The 2 choices use (...)
well ie3d manual is as good as this one as far as I can think. It is not well written. My experience is that ie3d is only good for planar structures with infinite ground plane. I have simulated some slot antennas using ie3d. They came very well and the speed was impressive. For finite (...)
Hi, I am trying to set up a problem in ie3d where there is an edge-fed loaded patch antenna. The problem is this: after setting up advanced extension differential port on the microstrip I would like to insert a probe feed to patch, however the program gives me an error: "unable to build the probe-feeds with error code (ic=1)". This problem o
Hi all again In this post I have simulated this paper with finite ground. But result?s isn?t exact too. . Could anybody check these files and tell me my mistake please? I will wait for your reply. Best Regards.
How can assign boundary to finite ground plane? Thanks
What do you mean half ground plane? On ie3d, you can define infinite ground on substrate or you can define finite ground plane using some polygons. If it is semi-infinite ground, you need to use finite ground to model it. (...)
Dear friend, I have one project at ie3d, my result is similar to article, it is return loss of antenna, my result is 10 db more than article, what do i friend?
Hi, kato01: CPW port is discussed much in ie3d user's manual. However, for slotline, you need to be careful. A slot on an infinite ground plane does not have a single fundamental mode. You may not be able to model it using transmission line theory even though a slot line as port of a circuit without ports are possible. If you define a (...)
You can define substrate, finite ground plane etc. in ie3d. In the help file of ie3d you can find example how to define all these.