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37 Threads found on edaboard.com: Finite Substrate ie3d
Hi, Does anybody know how to define finite substrate in ie3d 10.1 ?
HI, I am wondering if I can define finite substrate in ie3d. I find the default substrate size is too big. Thank you. danda821
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 (...)
Hi lovhana The difference, between simulations using infinite substrate and finite substrate with ground, is that you get nulls all around in 90° because there is no energy beyond the ground. And No back lobes that exist in finite substrate with ground plane. there is differenc in the (...)
Dears, I have a question how can i draw finite substrate frame in ie3d software? Thanks.
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 (...)
Hello Everybody: I'm trying to simualte an antipodal Vivaldi antenna on ie3d but I don't know how to do it. I would like to import both faces from two different dxf files, so inferior.dxf goes under the substrate, then the subtrate and the superior.dxf. I'm tryng to simulate a finite substrate big enough to hold both (...)
Hi, Wavenumber: 1. What antenna is it? If it is a patch antenna with a reasonable size substrate, the radiation efficiency should normally between 50% to 90% in the resonance bandwidth. Surface wave is an important source of loss to efficiency. ie3d is normally quite accurate in predicting the radiaiton efficiency for such a case. If it is an an
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 (...)
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 (...)
Hi, Authur568: It should be due to the meshing density is not large enough or meshing may not be fully aligned. Meshing alignment is very important for finite dielectrics modeling. Also, we did not take into account of the Er of the finite substrate in estimating the waveguide wavelength. The Er of the finite (...)
Hi, 2cent: It ist just 2 steps: 1. Define the dielectric type and remove the infinite subsrate in Basic Parameters. 2. Draw the shape of the finite dielectrics and define it as a finite dielectric call in Adv Edit->Define finite Dielectric Call. Regards.
Hello, I am trying to simulate a coaxial-probe-fed microstrip patch antenna to achieve some proven data. I am using ie3d EM Design System , Version 14.04. I used finite groundplane by defining No0. layer's conductivity to be 0, then drawing a rectangle as the metal ground. I used the method from section 16.2 of the ie3d manual to (...)
Dears, Please help me to solve the problem of UWB antenna design , error message appeared to me when i pressed on simulation button and this message told me " The magentic current modeling with finite dielectrics has not been implemented." I attached file design and snap shoot for error message. Thanks,
Dears, I made design of UWB antenna with finite substrate and microstrip feed line , i want to know if there is any mistake in drawing (specially for finite substrate and port feed on edge) and the result of simulation takes much time , i attached file that have Hexagonal Antenna for UWB applications. UWB antenna (...)
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" (...)
HI Ansoft ensemble and ansoft designer are not suitable for simulation of structures with finite ground plan.ie3d is better.
Hello everyone, I am trying to model a very simple structure in HFSS at 95 GHz. It is a half-wave dipole on a dielectric substrate (εr=28). I would like to model the substrate as extending to -Inf in the z direction and from -Inf to Inf in the x and y directions. I was hoping that I could accomplish just that by terminating a (...)
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 (...)
For infinite gnd and substrate 1. You need to change the connector dia according to requirement. 2. Change feed impedance to 100 in Modua For finite gnd and substrate just draw the entire feed including inner and outer conductor of the coaxial probe. Hi to all, I am presently engaged in design of folded (...)
Dear h.f, here are some small guidelines, try not to use FEM codes such as HFSS except for small antennas otherwise the simulation time would be extremely long. The best software for this purpose are ie3d which has a trial version but does not support finite substrate (at least untill version 10) , CST Microwave studio and XFDTD. (...)
I have few doubts in simulating phaseshifters based on BST in ie3d * Can materials like BST (εr= 2100) be simulated in ie3d? * How to define finite dimensions of a dielectric substrate in ie3d, like for simulating a planar structure with dielectric covering only a small portion of the structure? It (...)
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 END Z-COORDINATE = 0 an
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 ground. So below is my results (...)
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 (...)
the feko online/user manual explains how to define an edge port.The example folder of feko also contains a few examples for an edge fed rectangular patch antenna. That is true but only for inifinite substrates. There are are no SEP examples with an edge port for a finite substrate!
Hi, rc5: 1. There are some movies on the web site you can watch to see how ie3d is being used. 2. At this time, finite dielectrics is not implemented into the ie3dLIBRARY interface. You can only define them in MGRID. best regards,
Hi, Alberich: It looks like you use the infinite substrate model of ie3d for this antenna. It is excellent for antennas radiatng mainly in other than 90 degree angles. However, The null at 90 degree s caused by the infinite substrate. You may want to use finite substrate (...)
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 different formulations to model it. However, there is no implemention for (...)
I simulate an antenna with substrate of large thickness(more than 10mm at 10GHz), and use the infinite ground plane, and advanced extension port, so how can I set up the the port to avoid the warning " the substrate thickness factor for port is too big",and "the ground separation/length radio for port is too big", and could get the high (...)
Hi, I am trying to set up a model in ie3d for a printed dipole. The problem is how to definite the finite FR4 substrate. Please help me. Thanks!
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 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 is Lg=3
you must be having different substrate layers...select the bottom layer after you finish your structure and connections.....draw a rectangle in the bottom layer with desired dimensions such that it contains the struct....then give the dimensions...... i tell you how i do to select the ground plane step 1st i se
For ie3d, it defines an infinite ground plane. Will this affect the accuracy of the result?? Thanks. It is true what mahojazz suggested. In my view, you can start with ie3d since it is very easy and fast to design an antenna with air substrate. After you are happy with the results from ie3d, you can (...)
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. You just add some polygons to represent the finite (...)