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<td id="content-inside"><div id="content_fixed_bg"><table width="100%" border="0" cellspacing="0" cellpadding="0">
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<td align="left" valign="top"><p><img src="images/t_gems-tips.jpg" width="121" height="23" /></p></td>
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<td height="30" align="left" valign="middle" class="hd01">Tips for GEMS designer</td>
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<td align="left" valign="top">
<table width="100%" border="0" cellspacing="2" cellpadding="2">
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<td width="3%" align="center" valign="top" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td width="97%" align="left" valign="middle" class="text">You can prepare a project geometry in the CAD file formats such as SAT, ProE, IGES, STEPS, CATIA, DXF (2004 format), and import it to GEMS designer.</td>
</tr>
<tr>
<td align="center" valign="middle" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">Always use the half value of the fine structure dimension as the minimum cell size in the mesh design.</td>
</tr>
<tr>
<td align="center" valign="middle" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">Whenever it is possible, use the symmetric boundary condition to reduce the simulation time and memory usage.</td>
</tr>
<tr>
<td align="center" valign="middle" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">Use the Plumb line to draw the lumped and wave ports.</td>
</tr>
<tr>
<td align="center" valign="middle" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">For the thin slanted structure, you can use the coarse mesh if it is lossy or lossless dielectric, conductor, or, infinitely thin PEC sheet.</td>
</tr>
<tr>
<td align="center" valign="top" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">Draw the object with a finite thickness first then the object with an infinitely thin thickness to ensure the thin object is not erased by the touched objects.</td>
</tr>
<tr>
<td align="center" valign="top" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">For a symmetric structure fed by a co-planar structure, you can simulate half of the structure and use the lumped or wave ports to excite one side. Otherwise, you can extend and short the two ground sides and use lumped port between the ground and inner conductor.</td>
</tr>
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<td align="center" valign="middle" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">For the high-Q systems, the convergence level should be down to -40dB even -50dB. </td>
</tr>
<tr>
<td align="center" valign="middle" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">Adding the window function can speed up the convergence of the simulation. However, it may reduce the level of S-parameters.</td>
</tr>
</table>
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<td></td>
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</table></td>
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<tr>
<td height="30" align="left" class="hd01"><p>Tips for GEMS solver</p></td>
</tr>
<tr>
<td align="left" valign="top"><table width="100%" border="0" cellspacing="2" cellpadding="2">
<tr>
<td width="3%" align="center" valign="top" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td width="97%" align="left" valign="middle" class="text">For a complex geometry problem, you can increase the number of sub-domains to accelerate the project pre-processing.</td>
</tr>
<tr>
<td align="center" valign="middle" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">Use a cluster for your simulation whenever it is possible regardless of problem size.</td>
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<tr>
<td align="center" valign="middle" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">For the same hardware platform, the Linux platform can be faster and solve larger problem than the Windows platform.</td>
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<tr>
<td align="center" valign="middle" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">The network system significantly affects the simulation performance on a cluster.</td>
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<td align="center" valign="top" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">GEMS WBI supports the online simulation and does not require any knowledge of Linux system even your cluster is installed with Linux system.</td>
</tr>
<tr>
<td align="center" valign="top" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">GEMS Linux system cluster can be recovered by itself if something happens to it and does not require any IT support.</td>
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</table></td>
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<td align="left"> </td>
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<tr>
<td height="30" align="left" class="hd01"><p>Tips for GEMS display</p></td>
</tr>
<tr>
<td align="left" valign="top"><table width="100%" border="0" cellspacing="2" cellpadding="2">
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<td width="3%" align="center" valign="top" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td width="97%" align="left" valign="middle" class="text">You can double click on the GEMS direct output parameter in the result tree to view it.</td>
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<td align="center" valign="middle" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">Parameter in dB scale, the polar system requires a reference value.</td>
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<td align="center" valign="middle" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">You can export the output parameter into a data file by using the Export option in the file menu.</td>
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<td align="center" valign="middle" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">You can export the output parameters with the same attribute into one single file by selecting them in the result tree.</td>
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<td align="center" valign="top" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">You can change display scale of the 3-D field or current distribution in dB or linear scale. The reference of dB scale can be adjusted whenever it is necessary.</td>
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<td align="center" valign="top" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">After change the reference level in dB scale, you need to re-plot the distribution.</td>
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<td align="center" valign="top" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">GEMS data processing center allows you to derive your own output parameters. You can type the formula in the text box, validate the formula, feed the variables in the formula with the GEMS direct outputs, and do the calculation. You can plot a result in dB scale, linear scale, and Smith Chart. </td>
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<td align="center" valign="top" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">Use the built-in formula to derive more parameters from the GEMS direct results.</td>
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<td align="center" valign="top" class="text"><div align="center"><img src="images/bullet3.jpg" width="15" height="14" vspace="3" /></div></td>
<td align="left" valign="middle" class="text">You can also build your own formula library. </td>
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