- 易迪拓培训,专注于微波、射频、天线设计工程师的培养
Brillouin zone of a rhomboidal lattice cell - CST MWS
录入:edatop.com 点击:
Hello to everyone!
I'm actually working on photonic crystals, in particular I'm trying to evaluate the photonic band gap, through dispersion diagram, for a number of different lattice shapes.
I've already successfully did a square lattice, but for now I'm unable to obtain valid results for a rhomboidal lattice, like that of the screenshot appended.
I know that, to calculate the dispersion diagram, the irreducible Brillouin zone must be scanned. This is fundamentally a triangle in the xy plane (I'm doing everything for 2D photonic crystals).
The problem is (I think) that CST automatically assign a cubic or parallelepipedal boundary box to the structures being simulated, and then one must set periodic boundary conditions in the xy plane. This is ok for a square lattice, cause the structure is perfectly contained inside the boundary box, but for a rhomboidal form some box volume remain unfilled and the periodic boundary condition lead to an inaccurate solution.
To this date i was unable to shape a perfect rhomboidal boundary box in CST and I think this is impossible because the simulator sets automatically the box outside the geometry.
Moreover, I also found impossible to assign master-slave conditions to opposite sides of the structure, like one can do in HFSS for example.
Any suggestions on how to simulate a structure like this? Did anyone successfully did it?
Thanks to everyone!
I'm actually working on photonic crystals, in particular I'm trying to evaluate the photonic band gap, through dispersion diagram, for a number of different lattice shapes.
I've already successfully did a square lattice, but for now I'm unable to obtain valid results for a rhomboidal lattice, like that of the screenshot appended.
I know that, to calculate the dispersion diagram, the irreducible Brillouin zone must be scanned. This is fundamentally a triangle in the xy plane (I'm doing everything for 2D photonic crystals).
The problem is (I think) that CST automatically assign a cubic or parallelepipedal boundary box to the structures being simulated, and then one must set periodic boundary conditions in the xy plane. This is ok for a square lattice, cause the structure is perfectly contained inside the boundary box, but for a rhomboidal form some box volume remain unfilled and the periodic boundary condition lead to an inaccurate solution.
To this date i was unable to shape a perfect rhomboidal boundary box in CST and I think this is impossible because the simulator sets automatically the box outside the geometry.
Moreover, I also found impossible to assign master-slave conditions to opposite sides of the structure, like one can do in HFSS for example.
Any suggestions on how to simulate a structure like this? Did anyone successfully did it?
Thanks to everyone!
申明:网友回复良莠不齐,仅供参考。如需专业解答,请学习易迪拓培训专家讲授的CST视频培训教程。
上一篇:Determination of the modes types using CST Microwave studios
下一篇:Can I add passive components in CST?