Triangular Director Dipole Antenna with Rectangular Impedance Balun

This study presents a triangle director dipole antenna with rectangular impedance balun (RIB). The proposed consists of triangular director, coplanar waveguide (CPW) to stripline (CPS) transition line, and the RIB. substitutes typical planar quasi-Yagi antenna. has modified generates circular polarization. Also, RIB match an between CPW-fed CPS line. It obtains ultra-wide frequency band 4020 MHz (2160 - 6180 MHz), peak realized gain 12.5 – 6.2 dBi in operating band. shifts resonant lower 75% than antennas. uses widely for wireless medical communication, both ISM bands C-V2X applications.