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AN4190 Datasheet(PDF) 3 Page - STMicroelectronics |
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AN4190 Datasheet(HTML) 3 Page - STMicroelectronics |
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3 / 29 page ![]() AN4190 List of figures Doc ID 023812 Rev 1 3/29 List of figures Figure 1. Coordinate system for antenna analysis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 2. x - y plane omnidirectional antenna pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 3. E and H plane radiation patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 4. Field regions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 5. Near and far field regions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 6. Vertical, horizontal,3 and elliptic polarization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 7. Circular polarization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 8. Half-wave dipole antenna voltage and current distribution . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 9. Half-wave dipole antenna model and radiation patterns. . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 10. Quarter-wave monopole antenna design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 11. Inverted-L antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 12. Inverted-F antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 13. Spiral antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 14. Spiral antenna 3D radiation pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 15. Helical antenna implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 16. Helical antenna axial mode 3D radiation pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 17. Rectangular microstrip antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 18. 5.8 GHz patch antenna implementation and characteristics . . . . . . . . . . . . . . . . . . . . . . . 23 Figure 19. Ceramic antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Figure 20. Slot antenna implementation and 3D radiation pattern. . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 |
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