ADS-EMDS协同仿真结果的一致性问题

大家好，我在使用不同的网格参数值模拟ADS EMDS（FEM）的简单结构时遇到了一致性问题。
因此，我无法决定适当的尺寸，继续制造。
我创建了一个57.002欧姆特性阻抗的四分之一波阻抗变换器。
它通过使用64.98456008-Ohms的负载电阻进行测试，因为该阻抗由阻抗变压器转换为50欧姆。
仿真设置和结果在附件中给出。
总之，我发现EM电路协同仿真存在两个主要问题，使用EMDS（FEM）和ADS-2008：1。对于微带线的相同尺寸，用于实现变压器，匹配频率随着变化而变化
FEM设置（“需要Delta错误的连续迭代”和“网格播种”的编号）。
2.随着微带线长度的增加，匹配频率的变化表现出不合逻辑的行为。
我的意思是逻辑上匹配频率应该减少，但事实并非如此。
请允许任何人在这方面帮助我或指导我找相应的专家。
这严重制止了我的工作。
顺便说一句，我可能还想知道是否在EMDS中进行了任何修改，因为ADS版本从2008年变为2009年再到当前的2011年？
提前致谢！
Vivs



     以下为原文

  Hello Everyone,

I am facing consistency issues while simulating a simple structure with ADS EMDS (FEM), using different mesh parameters' values. Thus, I am not able to decide on proper dimensions, to go ahead for fabrication.

I created a quarter-wave impedance transformer of 57.002-Ohms characteristic impedance. It is tested by using a load resistance of 64.98456008-Ohms, as this impedance is converted by the impedance transformer into 50-Ohms.  

Simulation set-up and results are given in the attached file.

In sum, I found two main issues with the EM-circuit co-simulation, done using EMDS (FEM) and ADS-2008:
1. For same dimensions of the microstrip line, used to implement the transformer, matching frequency varied with change in FEM settings (no. of 'Consecutive Iterations of Delta Error Required' and 'Mesh Seeding').
2. As length of the microstrip line is increased, change in the matching frequency shows illogical behavior. I mean logically the matching frequency should decrease, but it does not.

May anyone please help me out in this regard OR direct me to the appropriate expert. This has severely halted my work.

By the way, I may also wish to know if any modifications are also done in EMDS, as ADS version changed from 2008 to 2009 and then to current 2011?

Thanks in Advance!
Vivs