Baluns for dipole with reflector

Abstract

In this work we propose that the dipole antenna can be fed directly through the coaxial cable, without any balun, when used with a perfect electric conductor (PEC) reflector placed at quarter wavelength distance. This configuration leads to a high impedance between the coaxial cable outer metal shield at the dipole feed point and the ground plane which restricts the current to flow on the outer metal shield of the coaxial cable.