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# Ads And Momentum And Mesh

## [ADS] Momentum Mesh doesn't fit layout

Hi guys, I am trying to simulate the characteristics of a branch-line coupler in EM simulation. However, the momentum mesh doesn't fit the layout (the upper edge marked in attached picture). No matter how many cells/wavelength are used or other options in mesh tab of simulation options are set, it didn't work. Anyone know the way to fix (...)

## Momentum design with strip and slot

Hello all! I am newbie in designs with momentum (ads 2009) and I have some doubts about this software. I'm trying to build a power divider and I have a first design with strips. The results are good with momentum but very difference if I use EMDS (with a difference of 15 (...)

## frequency meshing in ADS momentum

I'm less familiar with momentum specific settings, but in general, mesh density is indirectly set by the meshing frequency. higher frequency = shorter wavelength = tighter mesh to capture effects at frequency. If mesh density can be set independently from frequency then I agree with johnjoe. In (...)

## Approximating Complex Geometry to Reduce Analysis

Hi all, I've been using ads with momentum for years to simulate PCB boards. Often I import files from the mechanical engineers to create the basic outline. Now I've been toying with 3D EM simulators to generate antenna patterns on complex surfaces and have been having a lot of trouble. I've got an evaluation copy of (...)

## two question for simulation!

1-why momentum(ads) works with an infinite ground plane? The advantage is that these infinite planes (=boundary conditions) are available "for free", without having to mesh a "drawn" ground plane. This is more efficient for memory and simulation time. we can define a finite ground plane

## Agilent ADS slot/strip planes difference

Hi In agilent ads momentum there are two ways to model a ground plane: slot_planes and strip_planes. In slot_plane method the program only meshes the voids, like antipads and splits, while in strip_plane method it meshes the copper (...)

Hello all, I am having a problem of frequency shift in ads. I have a microstrip filter design which I simulate in momentum. This filter's center frequency in 1580MHz in ads 2009U1. However, the same filter's center frequency is 1615MHz in ads 2011. I use same substrate parameters and (...)

## how to delete mesh drawing in ADS layout

Hello there: I run into a problem and dont know how to get rid of it. I copied a piece of patch with mesh drawing on it to another layout design. then, I deleted that copied patch in the latter layout design. but the mesh persisted and I can not get rid of it. Did anyone here (...)

## Exporting from CST Layout to ADS 2008 using DXF

u have to create a new layer in ads. go to layer--> edit--> in the bottom enable new tab and give some layer name like (layout) and save now u import the structure it will import easily

## simulate with ADS momentum errors

Hi iamsailing, I'm suffering from the same error... In my experience,large area vias often cause mesh error. Try to treat vias as 3D. In addition,If your computer is 64bit and your ads version is 2008 Update2 or later, the error tends to take place.