A Compact, Broadband, High Isolated and Dual Polarized Cross Dipole Loaded with Metal Wall

In this paper, a compact dual polarized cross dipole is proposed, it has the characteristics of broadband, high isolation, and stable radiation pattern. Due to the loading of metal wall, the antenna has a broad bandwidth of 50% (1.50–2.65 GHz) under the compact aperture of only 0.3λ. In the meantime, the metal wall with this shape can restrain the antenna beam without distortion. The port isolation of this dual-polarized antenna is more than 25 dB and the maximum is 52 dB. In addition, the antenna has stable gain of 6 ± 0.4 dB in three frequency points of the matching broadband, it also has stable radiation pattern and good XPD performance which greater than 20 dB in E-plane and H-plane over the operating frequency band. Half power beam width (HPBW) of the proposed antenna is 81° in the central frequency point. All the above characteristics show that the antenna is a well candidate for the mobile base station.