cst design studio을이용한 waveguide component 해석 · what is cst design studio? b1 p3 p4 p1...
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EM Division Application Engineer Jakal www.tsne.co.kr
CST Design Studio을이용한Waveguide Component 해석
㈜태성에스엔이기술연구소
EM&MEMS Division
EM Division Application Engineer Jakal www.tsne.co.kr
What is CST Design Studio?
B1P3
P4
P1
P2
B4
B3
B2
Different reference impedances are taken into account.S
P1 P3
P2 P4
Splitting big structures in smaller blocks
EM Division Application Engineer Jakal www.tsne.co.kr
Simple Combline Filter
Problem: Time-signals decay slowly to zero.
Time-Signals from transient analysis
EM Division Application Engineer Jakal www.tsne.co.kr
S-Parameter From Transient Analysis
FFT: Fast Fourier TransformationThe S-Parameters still show the truncation error.
AR-Filter (Autoregressive Filter) AR-Filter significantly reduces the simulation time.
Frequency = 0.4 - 0.75 GHz
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Slice the Structure in Two Parts:
Part 1
Part 2
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Transient Analysis of Part 1
Additional (inner)Port
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Transient Analysis of Part 2
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S-Parameter Results From CST Design Studio:
EM Division Application Engineer Jakal www.tsne.co.kr
Power Divider
Number of meshcells : 33,858 Solver time : 7s
EM Division Application Engineer Jakal www.tsne.co.kr
Power Divider
Solver time : 0.5s
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Power Divider
Microwave Studio Design Studio
EM Division Application Engineer Jakal www.tsne.co.kr
Post Coupled Filter
Bandwith : 7.5~8.5GHz
Total time: 21,760s (= 8 m, 59 s )
Transient Solver(without AR-Filter) Eigenmode Solver
Total time: 21,760s (= 47 s )
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Post Coupled Filter
Solver time : 15s
COPY!!
EM Division Application Engineer Jakal www.tsne.co.kr
Post Coupled Filter
Microwave StudioDesign Studio
EM Division Application Engineer Jakal www.tsne.co.kr
Dual Mode Filter
Bandwith : 12~12.6GHz
Total time: 24852s (= 6 h, 54 m, 12 s )Total time: 24852s (= 15m )
EM Division Application Engineer Jakal www.tsne.co.kr
Conclusion
1. Microwave Studio와 Design Studio를이용하면, High Q을갖는 Filter나Waveguide Component에서빠르고정확한결과를얻을수있었다.
2. Block으로만들부분은 Critical한지점을피하면서, Resonant point을깨는구조를만드는것이빠르고정확한해를얻는조건이었다.
3. 현버젼(V2.3)에서구조을등가회로모델링하여, LC값을찾는데제약이있었다.
(추후가능하리라본다.)