Wideband Dual-Polarized Printed Dipole Antenna Using Differential Feed

Abstract

A novel wideband dual-polarized printed dipole antenna fed by two integrated feeding networks is presented. The feeding network, a kind of compact halfwave balun, delivers equal amplitude (within 0.1 dB) and 180° (±5°) phase difference between the two output ports from 1.65 to 2.8 GHz. By employing an H-shaped slot in each arm of the dipole, wide impedance bandwidth has been obtained. Experimental results show that the proposed antenna can operate from 1.7 to 2.7 GHz with low voltage standing wave ratios (<1.5) at the two ports. Low cross-polarization (>25 dB) and high isolation (>31 dB) are also achieved over the entire bandwidth. Moreover, stable radiation patterns and low back lobes are obtained by using a modified reflector.

Keywords:

• dual-polarized
• wideband
• balun
• high isolation
• low cross-polarization

Additional information

Funding

This work was supported by the National Science Foundation of China (grant 11247325), the Natural Science Foundation of Chongqing (grant cstc2013jcyjA40037), and the Scientific and Technological Research Program of Chongqing Municipal Education Commission (grant KJ130531).