1. Presentation
Antenna Engineering
In Topic
Design Of Square Patch Microstrip Antenna for
Circular Polarization Using IE3D Software

2. By
Mr. Anon Mosuwan51-3506-016-7
&
Mr. PratanSrikamonpattanawut51-3506-030-8
ENET R-41
3. Abstract
Communication between humans was first by sound through voice. With the desire for slightly more distance communication came, devices such as drums, then, visual methods such as signal flags and smoke signals were used. These optical communication devices, of course, utilized the light portion of the electromagnetic spectrum. It has been only very recent in human history that the electromagnetic spectrum, outside the visible region, has been employed for communication, through the use of radio. One of humankinds greatest natural resources is the electromagnetic spectrum and the antenna has been instrumental in harnessing this resource.
4. Aim and Objective
Microstrip patch antenna used to send onboard parameters of article to the ground while under operating conditions. The aim of the report is to design and fabricate a probe-fed Square Microstrip Patch Antenna and study the effect of antenna dimensions Length (L),and substrate parameters relative Dielectric constant (r), substrate thickness (t) on the radiation parameters of Bandwidth and Beam-width.
5. Design of Square Patch Microstrip Antenna for Circular Polarization using IE3D Simulator
Given specifications were,
1. Dielectric constant (r) = 2.55
2. Frequency (fr) = 3.0 GHz.
3. Height (h) = 1/16 Inch = 1.59 mm.
4. Velocity of light (c) = 3108 ms-1 .
5. Practical width (W) , W = 30 mm.
6. Loss Tangent (tan ) = 0.001.
7. Practical Length (L) L = 30 mm.
6. 1. Start Zeland Program Manager.
7. 2. Click on M-Grid().
8. 3. Go toFile>>>Newand then press ()
9. 4. Define Substrate Parameters and then click OK
10. 5. Click OK again for go to M-Grid window
11. 6. Click on Entity >>> Rectangle .
12. 7. Define the parameter follow below figure
13. 8. After step 7. you will see this figure
14. 9. Press shift+A for define X and Y coordinate of Probe feed
15. 10. After 9 step youll see this below figure
16. 11. Press shift+A again for define second X and Y coordinate of Probe feed
17. 12. After 11 step youll see this below figure
18. 13. Go to Entity >>> Probe-Feed to Patch
19. 14. Define the parameter follow below figure
20. 15. Youll see this below figure
21. 16. Go to Process >>> Simulateand then define the parameter follow this below figure
22. 17. Enter Frequency Rang for simulate
23. 18. After 17 step the window will show this below figure and then click OK for start the simulation
24. 19. After the simulation S parameter dB[s(1,1)]
25. 20. After the simulation S parameter dB[s(2,2)]
26. 21. After the simulation VSWR Port 1
27. 22. After the simulation VSWR Port 2
28. 23. After the simulation Smith ChartS(1,1)
29. 24. After the simulation Smith ChartS(2,2)
30. 25. After the simulation Current Distribution
31. 26. After the simulationElevation Pattern Gain Display
32. 27. After the simulation Total Field Gain vs. Frequency
33. 28. After the simulation Axial-Ratio vs. Frequency
34. Comparison when change Dielectric constant (r) from 2.55 to be 10
35. 1. Comparison S(1,1) Parameter
Before
After
36. 2. Comparison S(2,2) Parameter
Before
After
37. Before
After
3. Comparison VSWRport 1
38. Before
After
4. Comparison VSWRport 2
39. Before
After
5. Comparison Smith Chart S(1,1)
40. Before
After
6. Comparison Smith Chart S(2,2)
41. Before
After
7. Comparison 3D Distribution
42. Before
After
8. Comparison Elevation Pattern Gain Display
43. Before
After
9. Comparison Total Field Gain vs. Frequency
44. Before
After
10. Comparison Axial-Ratio vs. Frequency
45. Comparison when change Practical width (W) from 30 mm to be 60 mm andPractical Length (L)from 30 mm to be 60 mm
46. 1. Comparison S(1,1) Parameter
Before
After
47. 2. Comparison S(2,2) Parameter
Before
After
48. Before
After
3. Comparison VSWRport 1
49. Before
After
4. Comparison VSWRport 2
50. Before
After
5. Comparison Smith Chart S(1,1)
51. Before
After
6. Comparison Smith Chart S(2,2)
52. Before
After
7. Comparison 3D Distribution
53. Before
After
8. Comparison Elevation Pattern Gain Display
54. Before
After
9. Comparison Total Field Gain vs. Frequency
55. Before
After
10. Comparison Axial-Ratio vs. Frequency
56. Question ?
57. Thank you for attention our presentation
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