Dual Polarized Dual Antennas for 1.7–2.1 GHz LTE Base Stations

A novel antenna with both horizontal and vertical polarizations is proposed for 1.7–2.1 GHz LTE band small cell base stations. Horizontal polarization is achieved by using the Vivaldi antennas at the main PCB board in azimuth plane, whereas the vertical polarization is obtained using the rectangular monopole with curved corners in proximity of the horizontal elements. A prototype antenna associated with 8-elements (four horizontal and four vertical) is fabricated on the FR4 substrate with the thickness of 0.2 cm and 0.12 cm for Vivaldi and monopole antennas, respectively. Experimental results have validated the design procedure of the antenna with a volume of 14 $\times $ 14 $\times $ 4.5 cm $^{3}$ and indicated the realization of the requirements for the small cell base station applications.