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Microstrip Bandpass

Multilayer Solver Examples

 

 

 

 

General Description

 

S-parameters are calculated for a bandpass filter in microstrip.

 

Model Description

 

The bandpass filter consists of 8 partially overlapping coupled line filter segments that form 7 resonators each producing one pole. Specifying appropriate values for the block's properties leads to the filter characteristic of the system.

 

The coupled line sections are built with microstrip coupled lines 4port blocks and microstrip irregular coupled lines blocks. The open ends are terminated with microstrip open end blocks with zero length. Microstrip asymmetric step blocks with zero lengths are used to connect sections with different line widths. Since the filter geometry is symmetric the right half is built from the left half by clone blocks. This has two advantages:

  • Less blocks have to be calculated.

  • The geometric symmetry of the filter is enforced.

A new task "Simulation Project" was created. All blocks are selected to be considered by the 3D Model. The project type is "CST MICROWAVE STUDIO" and the solver type is "Multilayer".



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