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每天十五分鐘，兩周精熟Q3D

與HFSS相比，Q3D在網路上的學習資源其實很少，就算是英文的也找不到。許多先學HFSS再學Q3D的使用者，以為Q3D簡單，卻一些錯誤觀念沿用多年，甚至網路上還有過時的資料說Q3D無法輸出S參數，或以5G為頻寬上限，這些都非事實。(錯誤資訊)

這一系列課程，是站長十年IC設計公司系統/硬體設計與十年EDA公司軟體模擬經驗的結晶，為職業生涯留下一個里程紀錄。

上一步：Q3D線上入門課程

 

更多的模型匯入與前處理：

如何以Q3D匯入觸控面板設計(dxf/dwg), B站, 範例
-- Import .dxf with .tech
-- Import .dxf as 2D sheets to set "thin conductor"

QFN(框架)封裝設計(dxf/dwg)如何生成Q3D結構, B站, 範例
-- Edit Cross Section
-- Lead Modeling
-- Draw the layers in .dxf to the cross section definition
-- Export to Q3D

後處理與模擬結果匯出：

Q3D後處理 -- Float at infinity/GND/Float net, B站, 範例
-- How to add a [Reduce Matrix]
-- Float at Infinity
-- Float Net vs. Ground Net
-- Float at Infinity + Ground Net
-- Other Notices

Q3D後處理 -- Return Path NOT equal to GND net, B站, 範例
-- What do you think a reference plane work like ?
-- "Ground net" is NOT equal to "return path"
-- Return path and loop Inductance example
-- Is the loop L always larger than partial L ? ... No

Q3D如何確保輸出模型滿足數值合理性(可收斂性), B站, 範例
-- What is passivity and causality?
-- Case1/Case2/Case3/Case4/Case5 study
-- How to avoid non-passivity and non-causality
-- How to fix/enforce non-passivity and non-causality

為何同一封裝設計，不同公司以Q3D抽的RLC結果有時不同, B站, 範例
-- Different Q3D version
-- How to get RLC
-- How to treat GND net
-- Reference plane assumption
-- Source/Sink location and number
-- Grouping and floating net definition

其他：

Q3D生成S參數模型時，如何考慮參考地位置?, B站, 範例
-- Q3D vs. HFSS model
-- S-parameter exported from Q3D vs. HFSS
-- How does the RM(float at infinity) affect S-parameter Q3D export
-- Does the air box size in HFSS affect S-parameter

Q3D的RL要如何與HFSS結果正確比較? Part I, B站, 範例
-- How to plot RL in HFSS correctly ? (by Z₁₁ or 1/Y₁₁)
-- How to compare Q3D RL (DC~AC region) with HFSS correctly ?
-- Is there any other limitation for comparing Q3D and HFSS ?

Q3D的RL要如何與HFSS結果正確比較? Part II, B站, 範例
-- Reduced Matrix RL of Q3D can't consider the behavior of loop RL at resonance
... Is there a better approach for Q3D to handle it? the answer is "Yes"
-- Does not Q3D consider the return path changing with frequency increasing ?
... "Not really". It is just not as well as HFSS.

不同應用(TSP/PKG/PowerElectric)下的Q3D常見網格失敗分析與處理, B站, 範例
-- Bad quality triangles found in mesh
-- Two conductors ... are touching
-- Mesh leak is found for certain objects / Surface mesh generation fail
-- 1%, process 2% error : Exit code xxx from child process 'caxtr.exe'
-- Model analysis and Model healing
-- ACIS entity check failed for part : xxx

 

下一步：Q3D專家成就解鎖