SynMatrix Technical Notes: Computer-Aided Tuning

Optimization: Advanced Computer-Aided Tuning

Two-Port Tuning

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  • Advanced coupling matrix extraction technique
  • Evaluate RF performance by extracting error information directly from the simulation or test data (regardless of the lossy or lossless data)

Multi-Port Tuning

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  • Most popular coupling matrix extraction technique based on Y parameters
  • Define the lump port in your 3D simulation structure and extract frequency and coupling error info

Generic Optimization

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  • Based on circuit model
  • Retrieves EM simulation error by curve fitting the target through a variety of optimization methods
Two-Port Tuning: Mapping Rule --- Case 1: Coaxial Cavity Structure

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Two-Port Tuning : Mapping rule --- Case 2: Waveguide Structure

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  • Export the simulated S2P file from the EM simulation software
  • Select either simulated S2P filter or measurement S2P file
  • Once the S2P file is loaded into SynMatrix, the black-dot curve will show
  • The legend shows “Measured-S11” and “Measured-S21”

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app9.PNG By selecting the data format, user can review the coupling matrix in “CPW” which is Coupling Bandwidth or “Normalized” value. Convert the coupling matrix into table format to compare with the “Golden” matrix on the “SynMatrix” page.

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  • During the optimization process, user can turn on “Track Mode” to track the optimization process
  • It will compare the current error information with the previous
  • The “light red bar” shows the previous extracted error while
  • the “dark red bar” means the current error information
  • By comparing the error information with previous, user can know whether their optimization is in progress or not

The negative value for the frequency error means the frequency is lower than the target. The positive value means the frequency is higher than the target. This is the same as the coupling error.

app11.png The negative value for frequency error means the frequency is lower than the target. The positive value means the frequency is higher than the target. This is the same as the coupling error.

Multi-Port Tuning: Coaxial Structure

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  • Add lump port on top of each resonator (With the direction of max of electrical field)
  • Port number order:
    • Input port: port No.1(waveport); Output port: port No. 2(waveport)
    • 1st resonator: No.3(lump port)…….nth resonator: No.n+2(lump port)
Multi-Port Tuning: Result Analysis

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Multi-Port Tuning: Result Analysis

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If the extracted performance is not perfect enough or out of user’s expectation, user can click “Deep Optimization” to optimize it even further.

Generic Optimization: Continue with Coaxial Structure

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