如何定义基材

帮助指数为我在第一天摸索提供了足够的线索。
虽然模拟结果让我想知道我是否正确地做到了。
我选择在已经投入生产的成熟天线设计上开始我的模拟。
这是一款900MHz倒F，适用于我们（+4.1 dBi）并且相当全向。
当我在Genesys重建它时，这场比赛非常可怕。
在硬件方面，我看到S11在910 - 930MHz之间的性能优于-16dB。
我的模拟显示S11在500MHz时最佳情况为-3.6dB？
我没想到它会与所做的相提并论，但我确实期待一些比这更接近的东西。
我想我在构建Genesys模型时做了一个不好的假设。
我遵循的步骤如下。
我用微带元件制作了天线。
然后我在布局中将元素拉到一起。
然后，我倾倒了一个与之前在顶层实施的地面相匹配的地平面。
然后我在顶部下方放置了另一个12.4mil的地平面来重建内部地平面。
然后我放置一个矩形的基板来代表天线下面的PCB芯材料。
这些看起来像是一种糟糕的方法吗？
我附上了Genesys文件和原始天线的片段谢谢-Nick-
GEN_900MHZ_INV_F.zip4.7 MB



     以下为原文

  The help index has provided enough clues for me to fumble through my first day.  Though the simulation results have me wondering if I did it correctly.  I chose to start my simulations on a proven antenna design that has gone into production.  It is a 900MHz inverted F that preformed well for us(+4.1 dBi) and fairly omni-directional.

When I reconstructed it in Genesys the match is horrible.  In hardware I was seeing S11 better than -16dB from 910 - 930MHz.  My simulations show S11 best case of -3.6dB at 500MHz?  I didn't expect it to be a match to what was made but I did expect something a bit closer than that.  I imagine that I have made a bad assumption in constructing my Genesys model.  The steps I followed are below.

I built my antenna using microstrip elements.
I then pulled the elements together in layout.
I then poured a ground plane that matched what I previously implemented on top layer.
I then placed another ground plane 12.4mil below top to recreate the internal ground plane.
I then placed a rectangle of substrate to represent the PCB core material beneath the antenna.

Does any of that seem like a bad approach?  I have attached the Genesys files and a snip of the original antenna

Thanks
-Nick-

附件

• 900MHz_INV_F.PNG438.3 KB
  
• GEN_900MHZ_INV_F.zip4.7 MB
  

该演示确保使用“测量向导”可以轻松绘制天线数据。
事实上，索引帮助还使用“测量向导”概述了一个相当简单的过程。
但是当我打开图形属性窗口时，我看不到测量向导或方程向导按钮。
我查看了整个菜单结构，无法在任何地方找到测量向导。
是不是我们的Genesys座位没有购买？
谢谢-Nick-



     以下为原文

  The demo's sure make it look easy to plot antenna data using the "measurement wizard".  In fact the index help also outlines a fairly simple process using the "measurement wizard".  But when I open a graph properties window I do not see the measurement wizard or equation wizard buttons.  I have looked through my entire menu structure and I can't find the measurement wizard anywhere.  

Was that an add on that was not purchased with our seat of Genesys?

Thanks
-Nick-

双击图形，单击添加，单击更多测量，向导将打开。



     以下为原文

  double click on graph, click add, click more measurements and the wizard will open.

嘿回应！
我刚刚放弃了论坛的方法，但你已经恢复了我的希望。
谢谢唐。
我一直在阅读这些切口应该如何工作，但我似乎仍然无法进行平面切割，显示XY平面上方和下方的波瓣。
你有什么想法吗？
我可以在3D E总视图中清楚地看到4个裂片。
我正在尝试的切割是固定频率的ETOTAL，固定Phi并扫过Theta。
对于Phi = 0和theta扫过360度，它应该看起来像一个4叶三叶草。
我确实在XY平面的+ Z轴侧看到两个凸起，而在XY平面的-Z轴侧看不到任何东西。
似乎theta只是席卷了180度，我还没有找到解决这个问题的方法。
谢谢-Nick-Edited：NSmith于2012年11月1日下午12:33



     以下为原文

  Hey a response!  I had just about given up on the forum approach but you have restored my hope.
Thanks Don.

I have been reading up on how these cut aways are supposed to work but I still can't seem to do a planar cut that shows both the lobes above and below the XY plane.  Do you have any ideas on that?

I can clearly see 4 lobes in the 3D E total view.  The cut I am trying is ETOTAL for a fixed frequency, fixed Phi and swept Theta.  For Phi = 0 and theta swept 360degrees, it should look like a 4 leaf clover.  I do see the two lobes on the +Z axis side of XY plane and nothing for the -Z axis side of the XY plane.  It would seem that theta is only sweeping 180degrees and I have not yet found the option to fix this.

Thanks
-Nick-

Edited by: NSmith on Nov 1, 2012 12:33 PM