[SI-LIST] Re: Co-Planar Waveguides With Ground Plane Beneath
- From: steve weir <weirsi@xxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Mon, 28 Oct 2013 09:14:13 -0700
Darren both products can give you an accurate answer.
Make sure that you have set-up your model ground bounding box correctly
so that the etch on both the cpw layer and the ground layer connect to
it. The usual problem is the opposite: where plane layers inadvertently
get connected to the bounding box. You should be able to run a reduced
accuracy model in much less time in order to get a sanity check.
Steve.
On 10/28/2013 8:58 AM, Darren O'Connor wrote:
> Hello,
> We are simulating an RF bandpass filter using both Mentor Graphics (MG) and
> AWR Microwave Office. The layout implements a coplanar waveguide with a
> ground plane 10 mils beneath it. In MG we are using a finite ground plane,
> and we had connected an advanced extension port pair to the signal (+1) and
> ground (-1). When we simulated the filter response in MG 3-D EM tools, we got
> very poor results, and I now believe it is because we did not connect ports
> to the adjacent ground planes surrounding our signal on the top routing
> level. We are currently attempting to compare the results of MG and AWR for
> this circuit, and to correct our port connections, but it has been difficult
> to find any examples of how this should be set up.
>
> Is there anyone in this group who has either set up such a port structure or
> knows how to do so that could get back to me? It may be that it is as simple
> as connecting more of the (-1) advanced extension ports; however, the
> simulation takes many many days, so any help getting it right the first time
> would be appreciated.
>
> Thanks,
> Darren O'Connor
> Laboratory for Atmospheric and Space Physics
> (303)492-7613
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