Development of Aperture Coupled Closed form Formulae _LOwer Mode.ppt
- 1. Development of Compact Design Formulae For Aperture Coupled MPA for Satellite Communication Applications By: Amit Ghosh, Samik Chakraborty, SwarnadiptoGhosh, Dipankar Saha, Sunday Cookey Ekpo, Stephen Alabi
- 2. Overview • Introduction and analysis to Aperture coupled MPA • Closed form equations are presented for designing aperture coupled microstrip antennas to ensure impedance matching with the feed network with a low return loss over a wide frequency band. • The features like compactness, integrability with printed circuits, shielding of the radiating patch from the radiation emanating from the feed structure • Satellite communication in fields like high-speed video streaming, mobile computing, and communications. • Planar antennas array : 32 X 32 elements
- 3. An Aperture coupled MPA MPA Patch Substrate Ground Feed Substrate
- 9. M: Equivalent Magnetic Current in Aperture H field of the patch
- 10. M.H dv coupling
- 14. Yo, β characterize the rectangular patch antenna as a microstrip line of width b (Gr+jBopen) is the edge admittance of the patch. 𝐿1 = 𝑋0
- 15. Equivalent Circuit Model (w, Єrem, βm, Zom) are microstrip line parameters (lw, Єres, βs,Yos) are the corresponding slot line parameters
- 16. Development of Closed Form Design Formulae
- 17. Development of Closed Form Design Formulae
- 18. • Thus we get:
- 19. For average error=0.69%, max error = −2.6%
- 20. Using correlation techniques and truncation of Bessel Function upto 7th order term we obtain the Input Impedance at the feedline considering the presence of patch and slot can be expressed in closed form:
- 22. Single MPA Return loss vs. frequency plot for single aperture coupled patch (simulated) Radiation pattern for single aperture coupled patch(simulated) antenna substrate, thickness=1.5875 mm, Єr=2.4 for feedline substrate, thickness=0.79375 mm, Єr=2.4. resonant length= 3.70mm and patch width =5.60 mm 1.85 GHz 79.2 deg
- 23. 4x4 array of aperture coupled MPA
- 24. 4x4 array of aperture coupled MPA
- 25. 4x4 array of aperture coupled MPA
- 26. 4x4 array of aperture coupled MPA
- 27. 4x4 array of aperture coupled MPA
- 29. 4x4 array Results Return loss vs. frequency plot for aperture-coupledmicrostrip array (experimental) Radiation pattern for aperture-coupled microstrip array (experimental) Next, moving to32x32 Aperture coupled MPA
- 30. 32x32 Aperture coupled MPA
- 31. 32x32 Aperture coupled MPA
- 32. 32x32 Aperture coupled MPA
- 33. 32x32 Aperture coupled MPA Results Elevation plane radiation pattern of 32X32 aperture coupled microstrip patch antenna array
- 34. Thank You