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<table width="1000" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td rowspan="2" align="right" valign="bottom" ><img src="images/logo_top.jpg" width="257" height="83" alt=""></td>
<td width="715" height="42" align="right" valign="middle" style="padding-right:15px;"><table border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="93" align="left"><a href="about_us.html" onMouseOver="MM_swapImage('Image7','','images/top_l1_roll.jpg',1)" onMouseOut="MM_swapImgRestore()"><img src="images/top_l1.jpg" name="Image7" width="73" height="17" border="0" id="Image7"></a></td>
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<!-- InstanceBeginEditable name="page info" -->
<table width="1000" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td><img src="images/inside_head5.jpg" width="1000" height="83" /></td>
</tr>
<tr>
<td id="content-inside"><div id="content_fixed_bg"><table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td align="left" valign="top"><p><img src="images/t_success-stroires.jpg" width="166" height="21" /></p></td>
</tr>
<tr>
<td align="left" valign="middle"><span class="hd02">40-Element Helix Antenna Array</span></td>
</tr>
<tr>
<td align="left" valign="middle"> </td>
</tr>
<tr>
<td align="left" valign="top" class="text">The antenna array includes 40 helix elements, which are mounted on a circular PEC plate. And each helix element has a dielectric support. GEMS can simulate the arbitrary feed patterns with different phase and amplitude distributions, and calculate the far field pattern, s-parameter matrix, total reflection coefficient, and co-polarization, and cross polarization. To validate GEMS, we remove the dielectric supports and simulate it using MoM code and GEMS independently. We found that GEMS is in good agreement with the MoM result. However, the MoM code cannot simulate the original design due to the dielectric supports. In this design, the dielectric supports significantly affect the performance of antenna array; namely, the maximum gain decreases 2.45dB that is caused by the dielectric supports.</td>
</tr>
<tr>
<td align="left" valign="middle"><table width="100%" border="0" align="center" cellpadding="0" cellspacing="5">
<tr>
<td valign="top"><table width="98%" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td height="50" valign="middle" class="hd03">Helix Antenna Array</td>
</tr>
<tr>
<td align="center" valign="top"><img src="images/img_success-40element01.jpg" width="245" height="195" /></td>
</tr>
<tr>
<td align="center" valign="top"> </td>
</tr>
<tr>
<td height="55" class="hd03">Directivity comparison without<br />
dielectric supports </td>
</tr>
<tr>
<td align="center" valign="top"><img src="images/img_success-40element04.jpg" width="245" height="195" /></td>
</tr>
</table></td>
<td align="center" valign="top"><table width="98%" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td height="50" valign="middle" class="hd03"><p>Helix element structure</p></td>
</tr>
<tr>
<td align="center" valign="top"><img src="images/img_success-40element02.jpg" width="245" height="195" /></td>
</tr>
<tr>
<td align="center" valign="top"> </td>
</tr>
<tr>
<td height="55" class="hd03">Directivity comparison without<br />
dielectric supports </td>
</tr>
<tr>
<td align="center" valign="top"><img src="images/img_success-40element05.jpg" width="245" height="195" /></td>
</tr>
</table></td>
<td align="center" valign="top"><table width="98%" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td height="50" class="hd03"><p>Surface current distribution</p></td>
</tr>
<tr>
<td align="center" valign="top"><img src="images/img_success-40element03.jpg" width="245" height="195" /></td>
</tr>
<tr>
<td align="center" valign="top"> </td>
</tr>
<tr>
<td height="55" class="hd03">Directivity comparison with and <br />
without dielectric supports </td>
</tr>
<tr>
<td align="center" valign="top"><img src="images/img_success-40element06.jpg" width="245" height="195" /></td>
</tr>
</table></td>
</tr>
</table></td>
</tr>
<tr>
<td align="left" valign="middle"><table width="65%" border="0" align="center" cellpadding="0" cellspacing="5">
<tr>
<td height="50" align="center" class="hd03">Directivity comparison with and <br />
without dielectric supports </td>
</tr>
<tr>
<td align="center"><img src="images/img_success-40element07.jpg" width="245" height="195" /></td>
</tr>
</table></td>
</tr>
</table>
</div></td> </tr>
</table>
<!-- InstanceEndEditable -->
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<tr>
<td align="center" valign="top" class="copyright"><table width="90%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td align="left" valign="top">Copyright © 2016 纽尔科技. All Rights Reserved.</td>
<td align="right" valign="top">主页 | 联系我们 | 网站架构</td>
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<tr>
<td> </td>
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</table>
</body>
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