1. Broadband antenna and matching techniques

2. Contents Introduction Biconical antenna
Triangular sheet, Bow-tie, and wire simulation
Cylindrical dipole
Folded dipole
Discone and conical skirt monopole
Sleeve dipole
Matching techniques

3. Fundamental limit of BW
The band width of an antenna (which can be enclosed in a sphere of radius r) can be improved only if the antenna utilizes efficiently, with its geometrical configuration, the available volume within the sphere

5. Biconical antenna
Dominant TEM mode

9. The input impedance is independent of frequency.

12. Triangular sheet, bow-tie, wire simulation

14. Cylindrical dipole
Thick dipole has broad band characteristics.

16. Equivalent radii

17. Folded dipole FM broadcasting receiving (88~ 108MHz).
TV antenna (54~ 216MHz)

22. Equivalent circuit of folded dipole

25. Matching techniques

29. Balun and transformers

31. Type I or “bazooka” balun