Abstract
A broadband vertically/horizontally (V/H) dual-polarized antenna is proposed for mobile communication base stations. The antenna consists of two perpendicularly placed broadband planar antenna elements. By shaping the reflector for V/H dual-polarized antenna, a half-power beam width of 65±8° is achieved for both vertical and horizontal polarization. The V/H dual-polarized antenna has a bandwidth of 48% (1.7–2.75 GHz) for return loss >15 dB, an isolation of 30 dB, and an antenna gain of 9 dBi. An 8-element V/H dual-polarized antenna array is developed, which achieves a bandwidth of 45% (1.7–2.7 GHz) and an antenna gain of 16 dBi, suitable for GSM/UMTS/LTE base stations.
Highlights
Dual-polarized antennas are widely used in mobile communication base stations to improve the system performance by utilizing polarization diversity [1]
The simulated and measured HPBWs for the V/H dual-polarized antenna are plotted in Figure 2 with an antenna prototype
The radiation patterns simulated and measured for vertical polarization (VP) and horizontal polarization (HP) at the center frequency 2.2 GHz are plotted in Figure 3, showing a similar coverage for both VP and HP; the 10-dB beam widths in the y-z plane are 120∘. (There is no significant difference for the radiation pattern over the frequency range 1.7–2.7 GHz.) The antenna gain is about 9 dBi for both VP and HP
Summary
Dual-polarized antennas are widely used in mobile communication base stations to improve the system performance by utilizing polarization diversity [1]. We present a broadband V/H dual-polarized antenna based on the broadband planar antenna element developed in [20].
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