Optimized Wideband Impedance Matching Balun for Conducting Two-Arm Antennas

Table 1

Impedance matching bandwidth for different types of baluns used to feed a dipole antenna from a 50 Ω coaxial line.

VSWR (return loss)	Impedance matching bandwidth
	No Balun	Conventional split coaxial balun [11]	Balun proposed in the present work
1.5 (−14 dB)	2.5%	Not acceptable (0%)	12%
2.0 (−10 dB)	10%	23%	17.5%