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Corrugated Trapezoidal Structure in HFSS

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alamin_iut

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Hi All,

I am trying to carry out eigen mode solution upon a corrugated trapezoidal structure. I used metal and it shows solving inside a solid with high conductivity may require a large mesh in hfss. I have applied master slave boundary condition, want to carry the sim using metal. since i have a corrugated structure the whole objects became one. "not checking solve inside" is not of help. mesh operations should be defined. i need help badly.
 

alamin_iut

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i want to find out the reflection profile of a trapezoidally corrugated slow wave structure. for that i have to excite the structure with a antenna.how do i do that?
 

alamin_iut

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here i want to add some image of the designed structure
side view sws.pngsws.png
 

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PlanarMetamaterials

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i want to find out the reflection profile of a trapezoidally corrugated slow wave structure. for that i have to excite the structure with a antenna.how do i do that?

You can excite the structure with an incident plane wave for the general case. Use an antenna if you need a specific setup, but the simulation will be much larger.
 

alamin_iut

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for finding the reflection profile of the structure from resonance peaks i have to short the both sides with metal. what type of antenna should i use?

- - - Updated - - -

You can excite the structure with an incident plane wave for the general case. Use an antenna if you need a specific setup, but the simulation will be much larger.

Is it possible to find the s11 parameters if i use incident wave for excitation
 

PlanarMetamaterials

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for finding the reflection profile of the structure from resonance peaks i have to short the both sides with metal. what type of antenna should i use?

I'm not sure what you mean. Short both sides of what?

Is it possible to find the s11 parameters if i use incident wave for excitation

Yes. You need to insert a measurement plane. (Scattered Real Power/ Incident Real Power) integrated over this plane (for power normal to the plane, obviously) will give you the square of S11.
 

alamin_iut

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I'm not sure what you mean. Short both sides of what?


i am attaching one image of the arrangement here. by short i meant that i have to short the both ends of the structure as i want the reflection profile.

st.jpg
Yes. You need to insert a measurement plane. (Scattered Real Power/ Incident Real Power) integrated over this plane (for power normal to the plane, obviously) will give you the square of S11.

May you please elaborate on measurement plane.
 

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Any surface, really -- a square sheet should do. For best results, surface normal in the direction of propagation, and the sheet completely covers the cross-sectional area of the waveguide.

I'm not sure what you're expecting to get out of this test, though. Won't the power always be completely reflected?
 

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