x
z
Lf
a
Port 1
P
o
r
t
2
P
o
r
t
3
a
a
L
f
L
f
x
y
a=2 2.86 mm
b
=
1
0
.
1
6
m
m
HFSS Tutorial 3: Waveguide T-junction
Goal: design a rectangular waveguide T-junction operating at X-
band. The return loss must be less than 20 dB at 10 GHz. The X-band
standard waveguide size is .
Lessons learned:
• Wave port
• Convergence check on feedline length, port mesh and Max
Delta S.
1. Insert a New Design
Project->Insert HFSS Design
2. Save it as tutorial3
File->Save as
3. Calculate the guided wavelength at 10 GHz. We have
. Let .
4. Enter the above variables , and .
Project->Project Variables
5. Create two boxes with the following parameters.
a. size ( ), position ( ).
b. size ( ), position ( ).
Draw->Box
6. Use boolean operation to unite the two boxes.
Modeler->Bollean->Unite
7. Assign Perfect-E Boundary to the waveguides.
8. Assign Wave Port to the three port surface. Set de-embed length
1
