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Hfss tutorial2, Exercises of Microwave Engineering and Acoustics

Bangalore UniversityMicrowave Engineering and Acoustics

hfss antenna design

Typology: Exercises

2014/2015

Uploaded on 05/08/2015

kasarlasatish
kasarlasatish 🇮🇳

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bg1
Wp
x
y
B
x
ByLp
Lf
Wf
L
s
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s
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dx
sub str at e
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r=2. 54
HFSS Tutorial 2: Recess-fed Patch Antenna
Goal: design a microstripline edge-fed patch antenna operating at
2.425 GHz using a FR-4 substrate with thickness 1.6 mm, and
. The return loss must be less than 20 dB at 2.42 GHz.
Lessons learned:
• Boolean geometry operation.
• Field plot.
• Radiation Pattern.
• Optimization.
1. Insert a New Design
Project->Insert HFSS Design
2. Save it as tutorial2
File->Save as
3. Determine the approximate size of the patch.
. Set initially.
4. Determine the line width of a 50 microstrip line.
The width is about 3.1 mm ( ) . Let the length be near quarter
1
pf3
pf4
pf5

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Wp x y Bx By Lp Lf Wf Ls Ws Bt dx substrate x z dz airr =2.

HFSS Tutorial 2: Recess-fed Patch Antenna

Goal: design a microstripline edge-fed patch antenna operating at 2.425 GHz using a FR-4 substrate with thickness 1.6 mm, and

. The return loss must be less than 20 dB at 2.42 GHz. Lessons learned:

  • Boolean geometry operation.
  • Field plot.
  • Radiation Pattern.
  • Optimization.
  1. Insert a New Design Project->Insert HFSS Design
  2. Save it as tutorial File->Save as
  3. Determine the approximate size of the patch. . Set initially.
  4. Determine the line width of a 50 microstrip line. The width is about 3.1 mm ( ). Let the length be near quarter

wavelength ( )

  1. Let the size of the two recess slots be and.
  2. Determine the substrate size as where and . is the thickness.
  3. Determine the air box size where
  4. Enter the above variables. Project->Project Variables
  5. Enter the substrate Draw->Box Enter position as ( ). Give it a name “substrate”.
  6. Assign FR-4 material property to the substrate.
  7. Create the patch surface and name it “Patch”. Draw->Rectangle Enter the position and size as in 8.
  8. Enter the feed line. Give it a name “feedline”. Draw->Rectangle The position is ( ), size is ( ).
  9. Create the two recess slots. Name them “slot1” and “slot2”. Draw->Rectangle The position is ( ) and.
  10. Use boolean operation to remove the two slots by select the patch first and then the two slots. Modeler->Bollean->Subtract
  11. Define the ground plane. The position is ( ), size is ( ). Draw->Rectangle
  12. Define a surface for the lumped port at the end of the microstrip line. The position is ( ), size is ( ).

single point analysis).

  1. The result is. Perform a fast sweep to verify.
  2. Perform a single point analysis at 2.42 GHz.
  3. Select the patch and feeline surface. Right click and select “Plot Fields->J->ComplexMag_Jsuf”.
  4. Setup radiation. Radiation->Insert Far Field Setup Set “Step Size” to 1 degree. Set “Theta Stop” to 360.
  5. Plot the E-plane and H-plane gain pattern. Results->Create Far Fields Report->Radiation Pattern Choose and.

-30. -20. -10.

90 60 30 0

150 120 Radiation Pattern 1_1 (^) dB(GainTheta)^ Curve Info HFSSDesign1ANSOF T Setup1 : Single $Lp='27.91003619mm' Freq='2.42GHz' Phi='0deg' Setup1 : Single^ dB(GainTheta) $Lp='27.91003619mm' Freq='2.42GHz' Phi='90deg' Setup1 : Single^ dB(GainPhi) $Lp='27.91003619mm' $Ls='10.0723363mm' Freq='2.42GHz' Phi='0deg' Setup1 : Single^ dB(GainPhi) -60.00 1.00 1.25 1.50 1.75 (^) Freq [GHz]2.00 2.25 2.50 2.75 3. -50. -40. -30. -20. -10.

dB (S( 1 ,^1 )) S Parameter HFSSDesign1ANSOFT m Curve Info Name m1 (^) 2.4190X (^) -53.3435Y Setup1 : Fast dB(S(1,1))