Broadband printed dipole antenna with T-shape loadings

Broadband printed dipole antennas are studied in this paper. By applying a three-step microstrip transmission line as the integrated balun and symmetrically connecting a pair of identical T-shape metallic loadings with the two wings of the dipole, the bandwidth of the traditional printed dipole can be significantly enhanced. Simulations show that the proposed dipole antenna achieves a bandwidth of 80% and good radiation performance over the operating band is also obtained.