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Advanced EM Concepts for Planar Simulators

Homework 1: Setting up Calibration in EMSight and AXIEM

  • Types of ports in EMSight
  • Edge Port - The deembedding settings
  • Via and Series ports without calibration
  • Manually deembedding a via port
  • Edge ports and series ports in AXIEM
  • Edge port - explicit and implicit grounding options
  • Deembedding vs no deembedding for a simple line
  • Deembedding a one port, which is a via port

Lecture 1: Deembedding in EM Planar Simulators

  • What are calibration and deembedding?
  • Physical assumptions in models - proximity and line extension
  • Example of a via too close
  • Coupled line deembedding
  • Controlling deembedding the on/off settings
  • Example of a chip capacitor and grouped port deembedding

Homework 2: Internal Ports and Package Resonances

  • Package resonances in EMSight
  • A one stub filter example
  • Suppressing the resonance with an absorbing top
  • Finding the resonance by open stubs
  • Understanding internal (series) ports
  • Using internal ports for series circuit elements
  • The dangers of using an internal port with a circuit port

Lecture 2: Grounding Concepts

  • A poor man's manual deembed
  • Parasitics of an internal port - capacitance
  • Negating the capacitance
  • Using it with a real load
  • Y matrix and line calibration
  • 2X line calibration structure
  • Using a 0 length deembedding line
  • Manual calibration of a line on a ground

Homework 3: Differential Ports and Modes

  • Coupled ports
  • Coupled line deembedding
  • Differential and common modes
  • The symbol wizard
  • The MMCONV element
  • Asymmetric circuit and common mode generation
  • Differential ports in AXIEM
  • Differential ports in EMSight

Lecture 3: Coplanar Lines, Grounds in Packages

  • Coplanar lines and differential ports
  • Using the full six port and mode conversion
  • The "bad" mode
  • Thick metal for coplanar lines
  • EM and ground concepts
  • Using S parameters in circuits - need a port impedance
  • Use of explicit ground in S parameters
  • Example - Using explicit ground
  • Balanced ports
  • Example of a package and ground