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# Example9Coplanar Waveguide with Bend

### General

• A coplanar waveguide with bend is analyzed.

• Unless specified in the list below, the default conditions will be applied.

• [How to Reduce the Calculation Time]

### Analysis Space

 Item Settings Analysis Space 3D Model unit mm

### Analysis Conditions

 Item Settings Solvers Electromagnetic Analysis [Hertz] Analysis Type Harmonic analysis Options Select “Ignore the influence of face/edge electrode thickness” *

* This is the default setting. There are no face electrodes with this model. Therefore it is irrelevant to select it or not.

Mesh tab, Harmonic analysis tab and Open boundary tab are set as follows.

 Tab Setting Item Settings Mesh Tab Element type 2nd-order element Multigrid/Adaptive Mesh Method Select “Use the adaptive mesh method”. Frequency-Dependent Meshing Reference frequency: 8×10^9[Hz] Select “The conductor bodies thicker than the skin depth constitute the boundary condition.”   As Hot and GROUND are thicker than the skin depth, the surfaces are applied with the boundary condition having some loss. Harmonic analysis Frequency Minimum: 7.2×10^9[Hz] Maximum: 8.2×10^9[Hz] Sweep Type Select Linear step Division number: 10 Sweep Setting Select Discrete sweep Open boundary Type Absorbing boundary Order of Absorbing Boundary 1st degree

* Fast sweep is avoided for higher accuracy. The number of frequencies is relatively low, so the calculation will not take long.

### Model

Coplanar waveguide is formed on a alumina substrate. Electrodes of waveguide are solid bodies.

The outer boundary condition is “Electric wall”.

### Body Attributes and Materials

 Body Number/Type Body Attribute Name Material Name 4/Solid AIR 000_Air(*) 5/Solid SUB 001_Alumina 13/Solid HOT 003_Ag * 24/Solid GROUND 003_Ag * 26/Solid GROUND 003_Ag *

* Available from the Material DB

### Boundary Conditions

 Boundary Condition Name/Topology Tab Boundary Condition Type Settings PORT1/Face Electric I/O Port Reference Impedance: Select “Specify” and enter 50 ohms. Number of Modes Number of precalculated modes: 5 Number of modes used in the actual analysis: 1 Select modes: none PORT2/Face Electric I/O Port Same as above. Outer Boundary Condition Electric Electric wall

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