Planar dual-band dipole array for LTE/WiMAX access points

This work describes a planar 1 × 4 dipole array with dual-band operation for LTE / WiMAX access points. The impedance bandwidths, determined from VSWR ≤ 2.0, can reach about 525 / 747 MHz (20.2 / 21.3 %) for the 2.6 / 3.5 GHz operating bands, respectively, which are covering the required bandwidth for LTE (2.5 ~ 2.7 GHz) and WiMAX (3.3 ~ 3.7 GHz) system. This proposed dual-band dipole array also provides maximum peak antenna gains and efficiencies of 7.3 / 7.5 dBi and 89 / 75 % across 2.6 / 3.5 GHz bands, respectively, with good omni-directional radiation pattern in XY-plane.