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58 Threads found on edaboard.com: Perfect Conductor
Physically, there is no global ground. Ground is what you call ground, where you place your port's reference pin. However, even if you use PEC (perfect electric conductor) two points at some distance will have (and must have) delay and inductance between them.
Is it possible to define internal CPW port in HFSS simulation? - - - Updated - - - In one of the HFSS training manuals, it is given that : " Wave Port Restrictions: Port should be on exterior model face, or capped by a perfect conductor block if internal." Here, what does capped by a perfect conductor mea
How can I make the face of a cube perfect magnetic conducting in CADFEKO
I tried to make a S11 based measurement of a chip capacitor in HFSS (simulated measurements) I made a 50 Ohm microstrip line of layered impedance rectangles, put a rectangular patch at the end and applied 0.55 pF capacitive boundary to it. Other side of the capacitor is shunt with another vertical rectangle with perfect conductor layered impedan
Because EM radiation is nothing without the E. perfect conductor allows no E-field.
this looks like rogers substrate. not FR4. Are you sure about that? Copper as perfect conductor. infinitely thin planes are good enough. Are you using HFSS? Radiation boundary is set a box around the object. (size depending on the solve frequency).
Use Momentum will cover your whole structure by a closed perfect conductor. For more information, read relevant help topics.
I have a parallel plate capacitor. There is a plastic box in between the plates, touching the plates. I uesd lupmed port to excite this capacitor and used one face of this box to assign the port. The boundary condition for lumped port is to have to perfect E for the conductor on both sides of the port and perfect H for all other edges.Should (...)
No its not. The lumped port have to connect the inner conductor with the two outer conductors. Eventually use a sheet of perfect E to connect the lumped port to the outer conductors Eventually like this: Hope it helped, Mads
cst microwave...oh ok..does PEC is same with copper?i mean in terms of its characteristics No, different. PEC = perfect conductor (lossless) Copper has conductivity 5.8e7 S/m. The thickness of your RT5880 copper can have different values, so you need to check what copper thickness you have. There are two different sur
If you need to take loss into account, then you are going to need to use finite conductivity. But if you can ignore losses, then a waveguide needs to consist of nothing more than the dielectric, as the background material is PEC - perfect electrical conductor. So all you need is a box (for rectangular waveguide) or a cylinder (for round wavegui
All the waves get reflected when it is strike a perfect conductor.Why?
In HFSS, you need not to make them (patch and RIS) to assign them as perfect Electric conductor, rather what you should do is to select your patch and RIS and assign them as pec material, you may do so by drawing patch as a 3D figure (accounting for a very small height/thickness of the patch over the substrate) for example: you may draw a cylinder
I'm using cst. My structure is fully enclosed in a box of perfect electric conductor. If I try to add metal to all the sides of the structure, it gives me an error. I also tried setting the et=0 condition in all directions, but it didn't work. Please help :) Thanks in advance Norhan Nasr
I had a quick look. your radiation box only extends upwards. your antenna should be in the centre. I believe the radiation box is seen as a perfect conductor. this is probably why it doesn't work.
In simulation of split ring resonator using HFSS is it mandatory to use perfect Electric conductor (PEC) condition at top and bottom of Air Box where as perfect Magnetic conductor (PMC) boundary condition at sidewalls of Air boundary of air box.If it is so then why we require to do it and how to do it in HFSS? I had attached (...)
you mean a printed monopole or a real monopole ? anyway, there is a boundary called (perfect M) which a perfect magnetic conductor you can draw a 2d rectangle as a ground plane and assign this boundary to it hope this helps!
Because a perfect conductor (assumed in the derivation of the mode patterns) cannot support an electric field. Therefore the electrical field components tangential to the conductors are necessarily zero, as in the cases of the TE & TM modes.
Ok, so I've been simulating the tag antenna I made, it's attached here. I inserted a lumped port in the center which is where the IC chip is supposed to be. I used a vacuum as the radiating box and simulated. I set the antenna material to perfect conductor. But my S11 is off, it doesnt reach -10dB, and it goes past 1 GHz. What am I doing wrong?.. I
In ADS examples: \hpeesof\examples\Momentum\Microwave\Waveguide_prj, the substate define is as follwoing: all the three middle layers under "layout Layers" defined as "cond"..."perfect conductor". I want to know why the "air" layer has such definition? Attached pictuer:
Dear friends I try to simulate a cavity slot antenna with HFSS v11 but I get incorrect result! I think it's because of my wrong feeding !!(gap feeding) but what is the correct feeding ? In the paper is mentioned that : The feeding is applied between inner conductor and perfect electric conductor"" But I think I (...)
I would like to simulate spiral inductor with different materials using ADS (other software is also welcome) typically the conductor is perfect conductor. So how can I change the conductor property? Particularly I want to change the permeability of the conductor. Shall I add one more layer and define (...)
All FDTD software that I know supports lossless metal (perfect conductor). No problem.
Hello zoltan777, I see it is very easy to setup this just create em structure with tw dielectric layers stack up & define FR4 & Air then bottom boundary condition as perfect conductor (Ground) Then Draw the Microstrip Antenna structure.... It is very similar to suspended Microstrip structure setup... Attach your MWO file (*.emp) with di
I saw an article talking about the permittivity of a highly conductive material is very large and infinite for the perfect conductor. The following is from efunda.com "In general, good conductors such as metals have an essentially infinite permittivity. Finite permittivities are normally associated with dielectric materials that have (...)
Hi everyone, I want to model radiation pattern of a dipole antenna above a finite pmc (perfect magnetic conductor) with FEKO, but I don't know how. Can anyone help me??? Thank you
Hello Is it possible to implement closed shield in Agilent Momentum? For ex. Momentum gives non zero coupling between two small dipoles when one of them is in the perfect conductor box. Box is vias between two closed boundary.!(?) it looks via mesh is coarse to currents induced on vias cancell field of inner dipole.
the metal at optical frequency (especially visible wavelengths) is different from a microwave property, where metal can be considered as a perfect conductor. metals at optical frequency are dominated by the Drude dispertion. so, I suggest not to simulate your optical resonance cavity simply scaling the dimensions, as mentioned above.
Hi Rancid, As you said electric boundary is analogus to perfect Electric conductor (PEC). magnatic boundary condition is for perfect Magnetic conductor (PMC). These conditions are useful in creating walls, also for waveguide port. Regards
help will be very appreciated guys :cry: Hi! You should be more careful or learn more about HFSS! :) The surface of the cavity in the WG is perfect conductor! Use the HFSS->Boundary display in the menu to see it. Fill the cavity by vacuum and do the microstrip line longer!
Hi, I have the following question. Suppose I take an antenna with air substrate. Therefore there are no dielectric losses. The only source of loss is conductor loss, but I can made an antenna from silver and minimize the losses. Now, there is a theorem that states that I can match any impedance to any other impedance at a single frequency point w
Electric Feld: If there is a tangential electric field just outside the metal, according to boundary conditions, the equal tangential electric field should exist just inside the metal too. Now if there is a tangential electric field inside the metal, the line integral of this between any two points on the surface of the metal should give the
i want to know waht is different between cross product and dot product??? and fields at adielectric interface and fields at the interface with a perfect conductor and what n(the normal unit vector mean????and from where it come thank u for helping
If the CAE software does not support PMC or PEC blocks or mixed walls... just take back in mind, that a perfect conductor has "infinite" conductivity, which means... place your material where you need it and give the PEC "block/slice" the electric conductivity of 100e6 or the PMC "block/slice" the magnetic conductivity of 100e6 ...
i am trying to use PMC in my simulation. there is built in PEC in the simulation software but no PMC. now i am wondering how can i model PMC ? what properties should i assign to the PMC block? i can specify the following properties in my simulation package permitivity permeability electric conductivity electric loss tangent magnetic condu
hi all: I simulated a perfect magnetic conductor using HFSS v.11(2 PEC&2PMC walls), but the result of the reflection coefficient is not +1,the phase of reflection is about 141 deg operating 14GHz,the same as that of the absent pmc.Attatched file are my hfss file and photo of simulated phase. Please need to some help!
Who can tell me~ If a incident wave normally hits a perfect magnetic conductor, what's reflective coefficient and phase?The reflection is +1?
The planar transmission line has several types. Such as microstrip line,coupled line,coplanar waveguide,slot line. These transmission line's signal line and the ground plane are metal constitution (PEC). I want to know that the transmission line signal line part is a metal and the ground plane uses perfect magnetic conductor(PMC) to substi
Hello everyone, I don't know if someone can help me on this. I am trying to solve a simple scattering problem from a PEC (perfect electric conductor) rectangular plate. I have an incident field, and I also have prepared a boundary condition on the plate (Rad1). Also I have completed the near and far field sphere setups. I analyze and solv
In order to calculate the impedance , first u need a ground reference , try to draw another air cube containing your conductor cube , and assign pec to one side of the air box as reference ground while keeping the other 3 like RAD of perfect H boundary , the other 2 opposite side of the cube will be used for wave port regarding the dimension of the
I'm trying to simulate a log-periodic antenna in CST 2006. I've placed the port in the center at the feed point. Transient solver keeps reporting error "port is inside of a perfect conductor" (not the exact words) and terminates. Since I'm a beginner with CST, please help me solve this problem. Check my structure for errors... Thanks!
Hi, that is a nice question, but you can think of it this way For perfect dielectric (no losses) tand = 0 For perfect conductor (no losses, if you like to call it this way) tand = inf. The losses of the medium depends on where the current will flow. For lossy dielectrics, the current (if you consider it conduction current) flows in (...)
solve inside - implies exactly what it means. for instance if your conductor is of the planar style, you would not be able to solve inside. also attached to that same idea is if your conductor is of finite thickness but you defined a perfect E boundary (whether boundary defined or PEC defined) there would be no need to solve 'inside'. (...)
Hello, everyone. In present, I meet aproblem about the discrete port in CST MWS. The object is perfect conductor. When I set the discrete port on my model. I use the tool on the toolbar to select the middle points of two edge and then set the port on this two points. The discrete port will be set on the line which link the two points automatically
hello, plzzz someone help me in giving more details about perfect electric conductor(PEC) boundary conditions which is similar to PML in traditional FDTD method. Thank you
Hi, all, Why does the quality factor of the on-chip spiral inductor have a peak? I mean what dominate the loss at low freq. and what at high freq.? Thanks. Of course it has a peak since it's not a perfect inductor, instead it has many parasitic effects. At low freq, substrate loss and ohmic loss dominate, while at
Hi, I have a simple question about the intrinsic impedance of PEC, is it infinite or zero? Thanks.
Good morning to all. I am new to this forum and in HFSS (first design for me) and I have encountered a problem in my design. I am trying to draw a polyedron inside another polyedron (outside-->vacuum, inside-->perfect conductor) but I get the error message that the 3D model is incorrect because these two intersect. I have the design (I do not know
for perfect electric conductor, the current would flow/concentrate on the surface.
Yes, the waveport in HFSS can have lossy dielectric and/or good (non-perfect) conductor. my guess for your problem: 1. 2xTsub is hardly "large" enough, check convergence w.r.t. all the sizes that you set to be around 2xTsub. 2. make sure you understand the unit of the HFSS answer correctly.