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67 Threads found on Finite Ground ie3d
HI Ansoft ensemble and ansoft designer are not suitable for simulation of structures with finite ground plan.ie3d is better.
hi all, i have attached my PIFA antenna structure? how to make it to finite ground plane with particular dimensions? is my structure infinite gnd plane? if i change the plane length, the results also getting vary. help me in this reg ---jayanthi
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?
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,
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 (...)
I simulate an UWB patch antenna covering 3~11GHz, with the finite ground, the antenna size is 200mm, and the thickness is quite large(about 15mm), can the differential port work? For both frequency range and antenna dimension are too large,the simulation of every point takes very long time, so I decrease the mesh number to 6, and the result i
Hi, Bala: I sent you the explanation and revised geometry files 5 minutes ago. By the way, I just noticed that the resonace of your structure is not due to the CPW fed slot. It is due to the finite ground. The finite ground's resonance is at about 5.5 GHz and the slot's resonance is at about 8 GHz. When you define so wide (...)
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 there, I'm using ie3d to do simulation in rectangular patch antenna. I'm faced some problem which is modelling of an probe-fed patch antenna with infinite ground plane. I'm cannot place the feed point to the patch. And i'm checked the ie3d manual that have not this example, only infinite (...)
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 to all i have tried many PIFA structures in that ,i can able to achieve good return loss (near 1 db),good bandwidth (around 730Mhz),even efficiency around 85 to 90%,but iam not able to get good radiation pattern(that is iam getting back lobes).for the mobile applications the required radition pattern is near omnidirectional in azumithal plane.
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, 1. Define finite ground plane by changing Re of conductivity to zero of zero layer in Basic parameters.Any polygon in zero th layer will act as finite ground plane. 2.Construct polygon of slot dimension in any one of the that polygon. With the help of Advedit-->Buid holes and vias thr (...)
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
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 (...)
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.
Define a layer's sigma to a very large value for infinite ground. then Define a finite ground as some polygons.
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 (...)
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).
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.
Hi Jian, To start with I am simulating pifa antenna using ie3d, extension for mmic scheme. and the design was working perfectly too.. In pifa I am using finite ground plane, so differential feeding I am providing to the structure having 1 mm distance from (finite) ground plane.. THe problem is coming (...)
Did you simulated the antenna with finite ground plane? Also confirm the loss tangent and dielectric permitivity of the PCB you are using during ie3d design. Try to increase bandwidth a little. Try increasing the mesh frequency Or simply analyze the same design to achieve resonant frequency of 23.5 GHz. This way you will know which (...)
Hi all! I'm new with simulation and antenna design. I'm triying to simulate a probe-fed rectangular patch antenna on a finite ground plane. I designed this antenna by transmission line model using fiberglass as dielectric substrate with Er=4.4 and h=1.52mm. The size of this patch is L=29.47mm and W=38.03mm. The size of the ground plane (...)
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? (...)
I find it difficult to design UWB antenna in ie3d having finite ground plane. Can someone please help me by telling which type of ports to be used for the microstrip feed with finite ground plane and how to make a finite ground plane as in ie3d, by default, (...)
i have been using ie3d. but the sample folder installed in my computer has been "corrupted" please can anyone upload the sample folder or send it to my e-mail id "" the other problem is,i want finite ground plane which i got in sample folder,but i want air on same at z=0 above the finite (...)
Hello, I don't know the version of ie3d you have, but the older ones do support limited ground plane, but infinite dielectrics only. This will give zero radiation under zero elevation, while the actual antenna may produce radiation under zero elevation. You can remove the infinite groundplane by (...)
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 already have a structure for printed monopole antenna but i can't build it....i can't define a finite ground? and if some one can help me to understand this structure...thank
hello this time, i want to know about inset feed using ie3d. in ie3d when we have to set the finite ground plane then we have to put the value 0 to real part of conductivity in the 0 layer in the basic parameters but we want to give inset feed then do we still follow the same procedure to set the ground (...)
It seems to me the infinite substrate explanation is counterintuitive. Shounldn't we expect the effect of finite substrate to be more significant when the antenna is spaced further away from the ground? But ghb described that results for 100mil spacing are bettern than those of 30mils. More details of the design might be needed to get a (...)
They aren't listed all but appreciate good idea. OK, I have a question if someone have experience with comparing results of various p a t c h antennas (better say compact) given by ie3d and CST-MWS. Usually I'm getting frequency shift between those two. Note that I'm trying to set similar conditions when possible - like (in)finite (...)
The example of monoploe over a finite ground plane doesn't say much about the "low-frequency" performance of the code. Try problem requiring lmbda/1000 mesh. 30MHz is not necessarily low frequency? How does WIPL-D solve the monopole on finite ground problem in seconds?
Hi, Oggi: I would suggest you to try to optimize your element and 4-patch array using infinite ground plane first. Input impedance is normally not affected by the size and shape of the antenna much. You can optimize it to get good match first. ie3d has built-in optimizers to help you optimize antenna perforamnces (S11, Z, or even pattern (...)
In any simulator, ie3d or Microwave office, we supppose to do finite ground method for DGS simulations. I just taken 3 layer, top is trip line of width W, and in the bottom accoring to the size of etching draw the gound plane. It may take few hours to understand the simualtion set-up, as all
Hi, Adhi: Here are some models (edge fed, infinite gnd & sub, finite gnd &/or sub) for the 8 GHz range. You can start from them. I do want to warn you on the substrate thickness. The 2nd order mode should happen at about 30 GHz for a 0.35 mm thick substrate. Even you can use edge fed, microstrip lines in this frequency range with such a thic
Hi, pegasuss: (1) You can use ADV EXTENSION ports for the microstrip structures. If you model it as finite ground, you can use differential ports (either + and - using ADV EXTENSION ports or v-localized and h-localized ports). (2) You can use ie3d to model the connector more precisely. The procedure is a little bit tedious. We will try (...)
I am a student of electronical engeeniering and i am a new user of ie3d simulation program and i dont know how to put connectors on a structure.İn this structure there are two connectors on two sides.this is really a simple structure with a finite ground plane.I know the sizes and parameters but first of all, i want to learn how to put (...)